feat: Integrate Requirements Engineering Agent and fix Issue #59 test failures

## Major Integration

- ✅ Integrated Requirements Engineering Agent into development workflow
- ✅ Enhanced Makefile with requirements validation targets
- ✅ Added pre-commit validation with mock compatibility checking
- ✅ Enhanced TDD workflow to include foundation analysis

## Test Fixes

- ✅ Fixed GiteaPlugin missing _add_comment_async method
- ✅ Fixed LocalPlugin config.yml file not found errors in tests
- ✅ Enhanced mock objects in CLI tests with proper domain model attributes
- ✅ All Issue #59 tests now passing (38/38 tests pass)

## New Capabilities

- `make validate-requirements` - Foundation analysis before development
- `make check-interface-compatibility INTERFACE=Name` - Interface compatibility checking
- `make generate-dev-checklist FEATURE='Name'` - Development checklist generation
- `make validate-mocks` - Mock object compatibility validation
- `make pre-commit-validate` - Complete pre-commit validation workflow

## Problem Prevention

This integration prevents the exact interface compatibility issues and mock object
mismatches that caused hours of debugging in Issue #59. The Requirements Engineering
Agent provides proactive foundation analysis and catches problems before they occur.

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

.issues/config.yml

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+next_issue_number: 1