ReproGate v0.1.4

What changed

• Added reprogate init github-action to generate a ready-to-use GitHub Actions workflow.
• Added overwrite protection with --force for existing workflow files.
• Updated README and GitHub Actions recipes for one-command setup.

Verify

• go test ./...
• local CLI smoke test for workflow generation and overwrite protection
• GitHub Actions: reprogate and action-self-test passed on main