Hubspot: add plugin menu

[madebyisaacr]

Description

This pull request adds a plugin menu to the HubSpot plugin with a Log Out button.

Closes #323

Other changes:

• Fixed plugin having wrong height in canvas view, resulting in the bottom buttons being clipped.
  

• Fixed content not being centered in sign in view.
  

Testing

• When not signed in, there is no menu
• When signed in, there is a menu with a Log Out button
• Test in canvas and managed collection modes

[madebyisaacr]

Note: I had to do this to make logging in work without errors when testing on localhost. It runs fine in production without these changes.

[madebyisaacr]

Should we make logging out keep the plugin open and go back to the log in screen, instead of closing it?

[kaloyanvi]

Should we make logging out keep the plugin open and go back to the log in screen, instead of closing it?

Yes, for sure!

[tom-james-watson]

This seems to have a lot of issues running locally at the moment that are unrelated to the PR. Getting a bunch of valibot errors.

[elmarburke]

👌 Great one, code looks good
(I've updated one bit for wording about removing the plugin)

[elmarburke]

We need to look into the validation issue, the current version fails authentication for me — that's what you, @madebyisaacr, mention for local running it as well.

[madebyisaacr]

Merging now so the code on main matches the current live version (update was published a few days ago).

I'll open issues for the other feedback - log out flow and other errors.