changelog:

- add new nostr url format that works better for MacOS users
  `nostr://<*protocol>/<npub123>/<*relay-hint>/<identiifer>`
  \*optional
- status updates during clone, push and fetch
- intelligent protocol selection and fallback
  - unless unusual protocol specified in clone url it will try
    in this order:
    - fetch: https unatuth, ssh, https
    - push: ssh, https auth
  - save successful protocol in git config so it is tried first
    next time
  - enable override from nostr url (will only use this protocol)
- enable building binaries via nix
- refactor into lib and bin structure
- bump dependnancies
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