Notification tray for displaying in-flight requests

[somebody1234]

Pull Request Description

• Close https://github.com/enso-org/cloud-v2/issues/1641
  • Implement notification tray to display all in-flight mutations

Important Notes

• This PR uses useIsMutating to find mutation state. It's possible to use useIsFetching to also display query state - however "list directory" background refetching would cause constant notifications.
• UI is a placeholder - it does not need to be a notification tray, the important part of this PR is the new hook to return the state of all in-flight mutations.

Testing Instructions

• Do all mutation types (delete, rename, copy, move, undelete, force delete, clear trash)
• Open notification tray
• Check for notification
  • The notification may have disappeared if the mutation has completed - this is intentional as the notifications are not meant to be permanent.

Further Improvements

• Display red "unread notifications" badge when new notifications are in flight
• Consider creating permanent notification objects instead, which include a timestamp, and are (possibly) preserved indefinitely
  • If the user is (e.g.) uploading or deleting a lot of assets though, it would clutter up the notification tray if/unless notifications caused by mutations are collapsed.
  • Notifications do not exist server side, so they are not preserved across sessions. This is fine, but we might want to have a log of mutations on the server side eventually.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  TypeScript,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• Unit tests have been written where possible.
• If meaningful changes were made to logic or tests affecting Enso Cloud integration in the libraries,
  or the Snowflake database integration, a run of the Extra Tests has been scheduled.
  • If applicable, it is suggested to paste a link to a successful run of the Extra Tests.

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