request to add spin plugin list command

[rajatjindal]

it will be nice to list the plugins available to install (or already installed?)

[kate-goldenring]

listing available plugins (in the plugins repo) vs installed ones in fairly different on the implementation side. Do we want to support both? We could do the following:
spin plugin list: lists installed plugins
spin plugin search: displays all plugins available in plugins registry

[kate-goldenring]

Or maybe spin plugin install (without plugin name) can look like spin new where it outputs the plugins available in the spin plugins repo.

[itowlson]

Some tools use list and list --available (or, conversely, list --installed and list). I don't have a strong view though I do feel that search implies something different to list - it implies searching for a target rather than browsing what's out there.

[kate-goldenring]

apt list lists the catalog and apt list --installed lists installed so we may want to model after that since we have been consistent with apt so far