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>

tests/test_issue_59_local_plugin.py

@@ -6,7 +6,7 @@ provides offline issue management using markdown files and directories.
 """
 
 import pytest
-from unittest.mock import Mock, patch, mock_open
+from unittest.mock import Mock, patch, mock_open, call
 from pathlib import Path
 import tempfile
 import yaml
@@ -48,10 +48,14 @@ class TestLocalPluginInitialization:
 
         with patch('pathlib.Path.mkdir') as mock_mkdir:
             with patch('pathlib.Path.exists', return_value=False):
-                plugin = LocalPlugin(config)
+                with patch('builtins.open', mock_open()) as mock_file:
+                    with patch('yaml.dump') as mock_yaml_dump:
+                        plugin = LocalPlugin(config)
 
-                # Should create base directory and subdirectories
-                assert mock_mkdir.called
+                        # Should create base directory and subdirectories
+                        assert mock_mkdir.called
+                        # Should create config file
+                        assert mock_file.called
 
     def test_local_plugin_uses_default_directory_if_not_specified(self):
         """Test that LocalPlugin uses default directory when not specified."""
@@ -80,14 +84,17 @@ class TestLocalPluginDirectoryStructure:
 
         with patch('pathlib.Path.mkdir') as mock_mkdir:
             with patch('pathlib.Path.exists', return_value=False):
-                plugin = LocalPlugin(config)
+                with patch('builtins.open', mock_open()) as mock_file:
+                    with patch('yaml.dump') as mock_yaml_dump:
+                        plugin = LocalPlugin(config)
 
-                # Verify subdirectories are created
-                expected_calls = [
-                    patch.call(parents=True, exist_ok=True),  # Base directory
-                    patch.call(exist_ok=True),  # open subdirectory
-                    patch.call(exist_ok=True),  # closed subdirectory
-                ]
+                        # Verify subdirectories are created
+                        expected_calls = [
+                            call(parents=True, exist_ok=True),  # Base directory
+                            call(exist_ok=True),  # open subdirectory
+                            call(exist_ok=True),  # closed subdirectory
+                        ]
+                        assert mock_mkdir.call_count == 3
 
     def test_plugin_creates_config_file_if_missing(self):
         """Test that plugin creates config.yml if it doesn't exist."""