feat(ml-cellar): add docs command

[scepter914]

Summary

feat(ml-cellar): add docs command

Change point

• feat(ml-cellar): add docs command

[Copilot]

Pull request overview

This PR adds a new docs command to ml-cellar that generates documentation for ML models by rendering markdown templates with JSON data. The command reads a template file and a results JSON file, then replaces placeholders in the template with corresponding values from the JSON.

Changes:

• Added new docs command with template rendering functionality using regex-based placeholder substitution
• Removed unused write_result_to_readme function from check command
• Enhanced documentation with comprehensive usage examples and configuration details

Reviewed changes

Copilot reviewed 23 out of 33 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/bin/ml-cellar/docs.rs	New module implementing documentation generation with JSON-to-markdown template rendering
src/bin/ml-cellar/main.rs	Registered new Docs command with CLI argument parsing
src/bin/ml-cellar/check.rs	Removed obsolete write_result_to_readme function
src/rack.rs	Added detailed documentation for DocumentConfig fields
tests/test_docs.rs	Comprehensive test suite covering success and failure scenarios
tests/fixtures/*	Added test fixtures for docs command validation
docs/docs_template.md	Updated documentation with detailed usage guide
README.md	Minor improvements to repository setup instructions
Cargo.toml	Added serde_json and regex dependencies

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