Add goose versions to the UI

[zakiali]

This PR adds named agent versions to the UI. In the screen shot you'll see the current goose version into the bottom bar and an updated drop down menu to choose a version. Clicking on a version opens up a fresh chat window with the chosen agent version.

Happy to get feedback on this/hold it. This was mainly a POC for me to see if the named agents were working correctly and that the goose-server exposed the right data

[michaelneale]

where is this set? (BTW this section can be dynamicaly replaced at build time when packaging it up)

[michaelneale]

(ie in: https://github.com/block/goose/blob/v1.0/ui/desktop/bundle.py)

[zakiali]

currently not set, but defaults to the "base" version of the app (from goose-server), which is what we want. There's probably a better way to do and happy for feedback on that (first time on the UI side)

[michaelneale]

not quite sure I follow if this is for dev time or run time selection? (would want to make sure this works how you want it to when you build it into an .app). Would there be multiple agents in the one binary?

[zakiali]

@michaelneale
The flow I was thinking here was:

• user starts up app and defaults to the base agent (recommended and vetted performance)
• other versions of the agent are built into the binary. they can be chosen from the more menu to test new/updated functionality, etc..
• users can select a new version, and a new chat window is created with the new version

we could set env vars for the different agent versions, or have a some sort of selection window pop up but that seems like a not so great experience. Maybe a keyboard shortcut would be better here to open up an agent selection window? Not sure that the best approach is, but happy to get feedback there (and also happy if the UI team wants to take this integration over, just wanted something quick to test out the agent version selections from the UI)