Add branch and tag cleanup script for repository restructuring

[SL-Mar]

Summary

This PR introduces a comprehensive cleanup script that restructures the repository's branch and tag organization to properly reflect the project's versioning strategy and architecture evolution.

Key Changes

• New script: fix-branches-and-tags.sh - Automated cleanup and reorganization script that:
  • Resets the main branch to restored v1.0.0 content from the claude/restore-main-v1.0.0-fR2Y1 branch
  • Merges v2.0.0 updates into the gamma branch from claude/update-gamma-v2.0.0-fR2Y1
  • Creates proper semantic version tags (v1.0.0, v1.1.0, v2.0.0) pointing to their respective branches
  • Removes deprecated v0.x tags (v0.1, v0.2, v0.3)

Implementation Details

• Script uses set -e to exit on any errors, ensuring safe execution
• Includes graceful error handling for tag deletion operations that may already be completed
• Uses --force push for main branch reset and tag updates to override existing references
• Provides clear progress indicators and final summary of the new repository structure
• Documents the final state: main (v1.0.0 - quantcli), beta (v1.1.0 - quantcli), gamma (v2.0.0 - quantcoder)

Notes

This script should be run once to establish the new branch/tag structure. The force push operations will update the remote repository state.