Customize webview title

[tjcouch-sil]

As a user, I want the name of the tab I have open to provide helpful information to me as I work in the tab so I can see what tabs are effectively.

As an extension developer, I want to update my webview's title on the fly so I can update information embedded into the title bar.

Concrete example: As a user, I want to be able to see what projects are showing in my text collection in the tab's title so I can see the contents of the text collection at a glance.

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We need to add some way to edit the title of the webviews. Maybe from the webview provider (some async function to run to update the title) or maybe from the webview code itself (a couple of React props title and updateTitle?). Or maybe both.

[tjcouch-sil]

Split off from #222

[tjcouch-sil]

Split off detecting updates to #581 since it might be nice to have in very specific situations but probably isn't worth doing right now.

[tjcouch-sil]

PRs:
#583
paranext/paranext-extension-text-collection#12