feat: show agent metadata

[rodrimaia]

the UI alignment is not working as it is supposed to, I guess something related to the vscode tooltip internals (because the string itself is correct). I can investigate this later, but I don't think that is a blocker.

• We added the metadata to the sidebar instead of having a statusbaricon:
  

Closes #71

[matifali]

Wow loved it. Awesome addition.

[kylecarbs]

@rodrimaia the agent name is already shown in the workspace title, so I'm not sure we should add another item to the bottom bar all the time.

e.g. if I have no metadata right now, what shows up?

[BrunoQuaresma]

The code looks good to me. My only considerations are:

• What happens if it is empty or the agent is not connected
• If there is no way to align the value text to the right, I'm ok with this version

[rodrimaia]

• Hide/Close the statusbar icon if there is no metadata
• icon name changed to "Metadata"

[kylecarbs]

@rodrimaia could you update the screenshot with the new display?

[rodrimaia]

@rodrimaia could you update the screenshot with the new display?

@kylecarbs

[kylecarbs]

@rodrimaia thoughts on putting metadata in the Coder sidebar instead?

[kylecarbs]

The reason is that it's kinda odd for dynamic data to go in the tooltip, and in the UI we have a "Copy" button, which might be useful in the extension too.

[rodrimaia]

@kylecarbs I am experimenting with showing the metadata on the sidebar. I will post it here when I reach a working version.

[rodrimaia]