feat: Add version-tag-manager CI component

Overview

Adds automated version tag cleanup and management component for Drupal modules.

Component Features

• Tag Scanning: Detects all module tags automatically
• Validation: Generates execution plan with safety checks
• Manual Approval: Human-in-the-loop gate before destructive operations
• Cleanup: Removes incorrect version tags
• Tagging: Creates correct version tags
• Verification: Confirms all operations succeeded

Safety Features

• Dry-run mode for testing
• Preserve list for protecting important tags
• Detailed artifacts at each stage
• Full audit trail

Files Changed

• components/version-tag-manager.yml (new, 434 lines)

Documentation

• Wiki: Version Tag Manager Component
• Issues: #16, #17, #18, #19

Testing Plan

Will test with dry-run mode before production use.

Related Issues

Closes #16