feat: Add success notification on "set pinning" action

Currently, when we attempt to set pinning for a file, it will display a failure notification on failure, but we don't get any obvious feedback when the operation succeeds.

Example:

Currently, when I pin a file using a custom pinning provider (estuary) it succeeds, and the pin.status is "queued" but there is no visual indicator for this scenario. There are a few things going on here:

1. We need a success notification
2. We have a bug when displaying and handling "queued" pins

related to https://github.com/ipfs/ipfs-webui/pull/1919