feat: update README and commands documentation

[dermatz]

This pull request significantly improves MageForge's documentation for both users and contributors. The main changes include a comprehensive rewrite and restructuring of the README.md for clarity and usability, the addition of a detailed commands reference, and updates to advanced usage and custom builder documentation. A special thanks section was also added to acknowledge community contributors.

Documentation Restructuring and Improvements:

• Major rewrite and reorganization of README.md:
  • Clarifies project description, requirements, and supported theme types.
  • Streamlines installation and quick start instructions.
  • Expands on the Frontend Inspector features and usage.
  • Splits out and references a new Commands Reference document.
  • Improves contributor and support information.
• Adds a new docs/commands_reference.md file:
  • Provides a comprehensive, structured reference for all MageForge CLI commands, grouped by theme, Hyvä, and system commands.
  • Includes arguments, options, behaviors, and example usage for each command.
• Updates docs/advanced_usage.md:
  • Removes outdated content and prepares for revised advanced usage documentation.
• Updates docs/custom_theme_builders.md:
  • Corrects method signatures for build and watch in the PHP example to include the themeCode parameter, ensuring consistency with the actual interface. [1] [2] [3]

Community and Credits:

• Adds a "Special Thanks" section in README.md to acknowledge the e3n-team for their contributions to MageForge.

[Copilot]

Pull request overview

This PR restructures MageForge’s user-facing documentation by rewriting the root README, replacing the older commands doc with a new commands reference, and updating the custom builder documentation to match current interfaces.

Changes:

• Rewrote and reorganised README.md (requirements, quick start, inspector overview, doc links, credits).
• Replaced the previous commands documentation with a new docs/commands_reference.md.
• Updated the custom theme builder example signatures to include themeCode; removed the previous advanced usage doc.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
README.md	Reorganises end-user docs and links to the new commands reference (currently includes a broken link + a table formatting issue).
docs/custom_theme_builders.md	Updates PHP example method signatures to include themeCode parameter.
docs/commands.md	Removes the previous commands documentation file (superseded by the new reference).
docs/commands_reference.md	Adds a structured CLI command reference (currently contains an incorrect example theme code).
docs/advanced_usage.md	Removes the previous advanced usage document (README still references it).

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.