DUI3-174 Cancel ops on doc swap

[oguzhankoral]

UI implementation is ready to merge -> https://github.com/specklesystems/speckle-server/pull/2363

• We have command for each binding to set any message to UI as global toast notification
• I removed all old ICancelable interface from send and receive bindings. Which was something talking with @JR-Morgan
• I aligned naming of _cancellationManager in bindings. Some of still was having setter on CancellationManager
• I have dup code now on RevitSendBinding, AutocadSendBinding and AutocadReceiveBinding for document switch logic to cancel out all active operations and then tell UI to show message.
• Feel free to suggest better "message" on doc switch 🙂

Also would like to sync @clairekuang before merging in!

[clairekuang]

Note: removed the autocad portion, as operations can't be safely cancelled from the document store. Autocad op cancellation will be addressed in a separate pr, where the event is subscribed to from within the op instead of the binding