Be able to see progress for multiple activities

The LSP protocol allows the language server to update a client about the progress of multiple background activities via the WorkDoneProgress mechanism, where each activity is identified by a unique token. The VSCode status bar, though, can only show one activity at the time. If the server notifies the client about multiple activities, the last one wins and progress of the original activity is not shown to the user any longer. This is sub-optimal for a server like the Erlang one which performs many activities concurrently. As an example, we can parallelize the indexing process, but currently report progress only for a single indexer.

[bpasero]

I opened https://github.com/microsoft/vscode/pull/93363

[bpasero]

Something @isidorn recently added is “silent” notification progress, it works like this:

• you use IProgressService#withNotificationProgress with the silent option enabled
• you can call this multiple times for each individual progress you want to report
• notifications are being added but hidden in the notification center (thus “silent”)
• the status bar will show the currently active (= last reported progress) message
• clicking on the statusbar will reveal all progress notifications

I think that is a good compromise of not showing all notifications at once, but still be able to transition into more progress feedback as needed.