Use on_activated_async instead of on_load_async

[TerminalFi]

Switch to on activated. This is a more accurate way to update the discord presences. This ensures we only update when a file is receiving focus and not when its being previewed. Such as Go To Anything

Should fix #109

[FichteFoll]

Oh, I didn't even realize we never handled on_activated to begin with.

Thanks for the fix; I haven't seen or used this package in a while.

[FichteFoll]

Actually, I just realized that there is also on_modified_async which listens for changes and only then sets the active view (if the previous didn't change), so I think this will need some more consideration as to what the goal of the package is.

Should it only announce views that you made changes in or should it announce views that you focused? Depending on which we choose, we'd need to define either on_modified_async or on_activated_async but not both.

Either way, we'd also need a check for the view.element() so that we don't handle widget inputs such as the find panel or the command palette because those invoke on_activated.

[TerminalFi]

Based on the fact it had on_loaded and on_modified it would seem they are trying to capture both. However, the default message is "Editing in {}"

I think it would make sense to limit it to on_modified only.

@Snazzah thoughts?.

[Snazzah]

Should it only announce views that you made changes in or should it announce views that you focused?

Should announce views you focused on. Whatever the user is mainly looking at should be displayed through the presence.