Add automated release scripts

[eonist]

Summary

Adds bash scripts to automate the release process as requested in #39.

Changes

• ➕ cut-release.sh: Main script to automate tag creation and push
• ➕ rollback-release.sh: Utility script for rolling back releases

Features

• Safety checks: Validates git repository state, branch, uncommitted changes, and required files
• Interactive prompts: Asks for confirmation before performing destructive operations
• Colored output: Clear visual feedback with info, warning, and error messages
• Error handling: Uses set -euo pipefail for robust error handling
• Auto-rollback: Cleans up local tag if remote push fails
• Helpful links: Provides URLs to GitHub Actions and release pages

Usage

Create a release

chmod +x cut-release.sh
./cut-release.sh

Rollback a release

chmod +x rollback-release.sh
./rollback-release.sh diffsense@a1b2c3d

Testing

The scripts have been tested for:

• ✅ Git repository validation
• ✅ Branch checking and switching
• ✅ Uncommitted changes detection
• ✅ Required files verification
• ✅ Tag creation and push
• ✅ Error handling and rollback

Fixes #39