Further improve websocket disconnect messages

[DenisTensorWorks]

Component your feature request relates to

• Frontend

Problem your feature solves? Please describe.
Some further improvements in the disconnect message can make it event better.

Describe the solution you'd like

• Add a reason string here: https://github.com/EpicGames/PixelStreamingInfrastructure/blob/ce299ebd37d28965789cedb7cf0ede56b74a6d9d/Frontend/library/src/WebSockets/WebSocketController.ts#L202C1-L202C1
• Add a reason string here:

  PixelStreamingInfrastructure/Frontend/library/src/WebRtcPlayer/WebRtcPlayerController.ts

  Line 1674 in ce299eb

  close() {

• Improve this message:

  PixelStreamingInfrastructure/SignallingWebServer/cirrus.js

  Line 641 in ce299eb

  ws.close(1008, 'Cannot parse');

• Add a reason string here:

  PixelStreamingInfrastructure/SignallingWebServer/cirrus.js

  Line 978 in ce299eb

  function disconnectAllPlayers(streamerId) {

• Elaborate what the unsupported message here was:

  PixelStreamingInfrastructure/SignallingWebServer/cirrus.js

  Line 651 in ce299eb

  ws.close(1008, 'Unsupported message type');

• Consider whether this event should even close the websocket and not just log ^

[DenisTensorWorks]

The issue has been moved to the new repository: EpicGamesExt/PixelStreamingInfrastructure#17