v1.0

Initial commit: Add OpenAPI enum prefix fixer tool

- Add openapi_fix_enum_prefix command-line tool
- Remove common prefixes from enum values
- Convert enum values to lowercase
- Add comprehensive README with installation guide
- Add .gitignore for Go project

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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