WinMerge Parity Phase 1 + CI/CD Modernization

.github/CODEOWNERS

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+# Code Owners
+# This file defines who is automatically requested for review on PRs
+# that modify specific parts of the codebase.
+#
+# See: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Default owners for everything
+* @aecs4u
+
+# CI/CD workflows
+/.github/ @aecs4u
+
+# Core library - requires careful review
+/rcompare_core/ @aecs4u
+
+# Documentation
+/docs/ @aecs4u
+*.md @aecs4u
+
+# Security-sensitive files
+/deny.toml @aecs4u
+/Cargo.lock @aecs4u

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Create a report to help us improve
+title: '[BUG] '
+labels: bug
+assignees: ''
+---
+
+## Bug Description
+
+<!-- A clear and concise description of what the bug is -->
+
+## Steps to Reproduce
+
+1. Go to '...'
+2. Click on '...'
+3. Run command '...'
+4. See error
+
+## Expected Behavior
+
+<!-- What you expected to happen -->
+
+## Actual Behavior
+
+<!-- What actually happened -->
+
+## Environment
+
+**RCompare Version:**
+- Version: [e.g., v0.1.0 or commit hash]
+- Component: [CLI / GUI]
+
+**System:**
+- OS: [e.g., Ubuntu 22.04, Windows 11, macOS 14]
+- Rust Version: [e.g., 1.75.0]
+
+## Additional Context
+
+<!-- Add any other context about the problem -->
+<!-- Screenshots, error messages, logs, etc. -->
+
+## Error Messages/Logs
+
+```
+Paste error messages or relevant logs here
+```
+
+## Possible Solution
+
+<!-- Optional: Suggest a fix or workaround if you have one -->

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: Documentation
+    url: https://github.com/aecs4u/rcompare/tree/main/docs
+    about: Check the documentation for guides and examples
+  - name: Discussions
+    url: https://github.com/aecs4u/rcompare/discussions
+    about: Ask questions and discuss ideas with the community

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for RCompare
+title: '[FEATURE] '
+labels: enhancement
+assignees: ''
+---
+
+## Feature Description
+
+<!-- A clear and concise description of the feature you'd like -->
+
+## Motivation
+
+<!-- Why do you need this feature? What problem does it solve? -->
+
+## Use Case
+
+<!-- Describe a specific scenario where this feature would be useful -->
+
+## Proposed Solution
+
+<!-- Describe how you imagine this feature working -->
+
+## Alternatives Considered
+
+<!-- Have you considered any alternative solutions or workarounds? -->
+
+## Related Features
+
+<!-- Are there similar features in other tools (Beyond Compare, WinMerge, Meld)? -->
+<!-- Please describe how they work -->
+
+## Additional Context
+
+<!-- Add any other context, screenshots, or mockups about the feature -->
+
+## Implementation Willingness
+
+<!-- Are you willing to contribute to implementing this feature? -->
+
+- [ ] I can help implement this feature
+- [ ] I can help test this feature
+- [ ] I can only provide feedback
+
+## Priority
+
+<!-- How important is this feature to you? -->
+
+- [ ] Critical - Blocking my workflow
+- [ ] High - Would significantly improve my workflow
+- [ ] Medium - Nice to have
+- [ ] Low - Minor convenience

.github/dependabot.yml

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+version: 2
+updates:
+  # Cargo dependencies
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 10
+    labels:
+      - "dependencies"
+      - "rust"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    groups:
+      # Group minor and patch updates for core dependencies
+      production-dependencies:
+        patterns:
+          - "*"
+        update-types:
+          - "minor"
+          - "patch"
+
+  # GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "monday"
+    open-pull-requests-limit: 5
+    labels:
+      - "dependencies"
+      - "github-actions"
+    commit-message:
+      prefix: "ci"
+      include: "scope"

.github/labeler.yml

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+# Automatic PR labeling based on changed files
+
+# Core library changes
+core:
+  - changed-files:
+    - any-glob-to-any-file: 'rcompare_core/**/*'
+
+# CLI changes
+cli:
+  - changed-files:
+    - any-glob-to-any-file: 'rcompare_cli/**/*'
+
+# GUI changes
+gui:
+  - changed-files:
+    - any-glob-to-any-file: 'rcompare_gui/**/*'
+
+# Common/shared changes
+common:
+  - changed-files:
+    - any-glob-to-any-file: 'rcompare_common/**/*'
+
+# Documentation changes
+documentation:
+  - changed-files:
+    - any-glob-to-any-file:
+      - '**/*.md'
+      - 'docs/**/*'
+
+# CI/CD changes
+ci:
+  - changed-files:
+    - any-glob-to-any-file:
+      - '.github/**/*'
+      - '.gitlab-ci.yml'
+
+# Test changes
+tests:
+  - changed-files:
+    - any-glob-to-any-file:
+      - '**/tests/**/*'
+      - '**/*_test.rs'
+      - '**/*_tests.rs'
+
+# Dependencies
+dependencies:
+  - changed-files:
+    - any-glob-to-any-file:
+      - '**/Cargo.toml'
+      - '**/Cargo.lock'

.github/pull_request_template.md

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+## Description
+
+<!-- Describe your changes in detail -->
+
+## Type of Change
+
+<!-- Mark the relevant option with an 'x' -->
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] Performance improvement
+- [ ] Code refactoring
+- [ ] CI/CD improvement
+- [ ] Dependency update
+
+## Motivation and Context
+
+<!-- Why is this change required? What problem does it solve? -->
+<!-- If it fixes an open issue, please link to the issue here -->
+
+Fixes #(issue)
+
+## How Has This Been Tested?
+
+<!-- Describe the tests you ran to verify your changes -->
+<!-- Provide instructions so reviewers can reproduce -->
+
+- [ ] Local cargo test
+- [ ] GUI manual testing
+- [ ] CLI manual testing
+- [ ] Cross-platform testing (Linux/Windows/macOS)
+- [ ] Added new tests
+
+**Test Configuration:**
+- Rust version:
+- OS:
+
+## Screenshots (if appropriate)
+
+<!-- Add screenshots here if the changes affect the UI -->
+
+## Checklist
+
+<!-- Mark items with an 'x' when completed -->
+
+- [ ] My code follows the project's code style
+- [ ] I have run `cargo fmt --all`
+- [ ] I have run `cargo clippy --all-targets --all-features`
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] Any dependent changes have been merged and published
+
+## Related PRs or Issues
+
+<!-- List any related pull requests or issues -->
+
+- Related PR: #
+- Blocks: #
+- Blocked by: #
+
+## Additional Notes
+
+<!-- Add any other context about the PR here -->