Add the Open Home Foundation AI Policy

[frenck]

Description

Adds the Open Home Foundation AI Policy to this repository. This is part of a rollout across all repositories in the home-assistant and home-assistant-libs organizations, announced in this blog post.

• Adds AI_POLICY.md to the repository root.
• Adds a reference to the policy in CONTRIBUTING.md.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)
• CI/CD changes

Related Issues

Not applicable, this is an organization-wide policy rollout.

Testing

Not applicable, this change only adds documentation.

• Unit tests added/updated
• E2E tests added/updated
• Manually tested on macOS
• Manually tested on Windows
• Manually tested on Linux

Screenshots

Not applicable, no UI changes.

Checklist

• My code follows the project's code style
• I have run cargo fmt and npm run lint
• I have added tests for my changes
• All new and existing tests pass
• I have updated documentation if needed
• My commits follow conventional commit format

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.54%. Comparing base (221e388) to head (12d1531).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #63   +/-   ##
=======================================
  Coverage   89.54%   89.54%           
=======================================
  Files          29       29           
  Lines       10910    10910           
  Branches       84       84           
=======================================
  Hits         9769     9769           
  Misses       1141     1141           

Flag	Coverage Δ
backend	92.01% <ø> (ø)
frontend	84.86% <ø> (ø)

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[Copilot]

Pull request overview

Adds the organization-wide Open Home Foundation AI Policy and contributor guidance.

Changes:

• Adds the canonical AI policy.
• Links and summarizes it in contribution guidelines.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
AI_POLICY.md	Adds the AI contribution policy.
CONTRIBUTING.md	Links and summarizes the policy.