- Refactor `ModelSubmissionHandler` to support proper handling of the `RequestModelAction`
as real request action 
- Add support for rejecting request actions
Part-of: eclipse-glsp/glsp#1116
Part-of: eclipse-glsp/glsp#606

Refactor the base GLSP protocol to allow the client to tell the server which actions it is going to handle i.e. which actions should be forwarded to the client
- Add `clientActions` array to `InitializeClientSessionParams`. This means the client now has to pass the action kinds it wants to handle as part of the initalize request
- Refactor `ClientSessionManager` API directly use the `InitializeClientSessionParams` object for creating new sessions. This means that the `ClientSessionManager` can also access the generic `args` properties that might have been passed with the initialize request.
- Replace `ClientActionHandler` with `ClientActionForwader` a separate component that is not part of the server-side action handlers. 
- Remove `configureClientActions` method from `DiagramModule` as the explicit configuration is no longer needed
- Refactor `ClientIdModule` to `ClietnSessionModule` responsible for injection session specific configuration like the clientId and the clientActions

Part of eclipse-glsp/glsp/issues/1117

Also remove unused `ServerStatus` class
Part of eclipse-glsp/glsp#1071