Move updates to external tooling

⚠️ BREAKING CHANGES - The Go module is now secluded.site/git-format, and development has moved to Tangled. - The built-in git-format upgrade command has been removed. Use the auto-updating mise configuration from releases.secluded.site or download binaries there manually. 🔧 Build System - Move the release workflow to jj and Tangled. -----BEGIN SSH SIGNATURE----- U1NIU0lHAAAAAQAAAEoAAAAac2stc3NoLWVkMjU1MTlAb3BlbnNzaC5jb20AAAAgzEkAhr f0dc6ZiSJXHc/mDhl7rRRGcNCSuENi7R/pfKkAAAAEc3NoOgAAAANnaXQAAAAAAAAABnNo YTUxMgAAAGcAAAAac2stc3NoLWVkMjU1MTlAb3BlbnNzaC5jb20AAABAGJMpWl7n3ZSwc8 izsQbIckS40i8/zxVFaWcSXwZhpIs/1fiJnvRu7vcTxtIGczvPl30HU8mHDPMApvIr5xmD DQEAATsr -----END SSH SIGNATURE-----