feat: add extensible recipe registry and CLI command

[Dbansal06]

Overview

This PR introduces a Recipe System, allowing users to define and execute custom task templates. This effectively allows Coderrr to be extended with specialized "plugins" without modifying the source code.

✅ Implementation Checklist

• Recipe Engine: Created src/recipeManager.js to handle dynamic filesystem scanning and JSON parsing.
• Registry UI: Added src/recipeUI.js for a clean, user-friendly dashboard of available workflows.
• Safety Layer: Implemented src/utils/recipeValidator.js to prevent malformed templates from executing.
• CLI Command: Integrated the recipe command into the commander entry point in bin/coderrr.js.
• Automated Tests: Verified the registry logic with test/recipes.test.js (100% pass rate).
• Documentation: Added docs/recipes.md explaining how users can create and share their own recipes.

Verification Results

• Logic Check: npx jest test/recipes.test.js passed.
• UI Check: node bin/coderrr.js recipe --list correctly displays local recipes.

Impact

Adds zero overhead to the core agent but provides a massive productivity boost for recurring workflows.

closes #119
@Akash-nath29 Can u please review and merge and if there is any changes required please let me know .
Thanks!

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