feat: check for external auth before running task

[code-asher]

It seems we do not validate external auth in the backend currently, so I opted to do this in the frontend to match the create workspace page.

Closes #18166

[code-asher]

@bpmct I basically just ported over the external auth section from the create workspace page, except I only show the section if there is auth that needs to be connected. The run task button is disabled until authed. wdyt?

recording.mp4

[bpmct]

Works for me!

[code-asher]

tagging @BrunoQuaresma for a sanity check on the frontend

[BrunoQuaresma]

I think we can have a better design for this, but I'm going to approve it for now since it is working as expected. In my head, the "Login with GitHub" should appear on the right side of the "select" to keep it close to its context.

[code-asher]

Yeah I think we can def have a better design, I just copied what was on the create workspace page lol

One thing to keep in mind is there could be many login buttons (we only have two on dev.coder.com but in theory there could be an infinite number). Maybe we have a single "login" button that opens a dialog with all the external auth options.

[matifali]

BTW, this seems related to #11367