WebSocket profiler for HTML5 platform [4.0]

[Faless]

Closes #33925 . Much cleaner after the refactor.

In this PR:

• Remove WebSocket defaults from project settings.
  Can already be manually set, let's not pollute them further (and it was giving troubles with this PR due to the fact that modules project settings are inited too late).
• Platforms can now register additional URI/protocol handlers for debugging. (see EngineDebugger::register_uri_handler and EditorDebuggerServer::register_protocol_handler)
• EditorExportPlatform can now specify the debug protocol (so both the editor and the exported game can match the desired protocol).
• Add new RemoteDebuggerPeerWebSocket and EditorDebuggerServerWebsocket implementation for debugging (a bit less performant than the regular one as it does not use threads but can be used in HTML5).
• HTML5 exports now support additional flags (command line) to be passed via startGame.

@punto- this should allow to create an implementation for iOS as we discussed at GodotCon, let me know if you see there are still limitations.

Note: to enable debug for HTML5 native run, check the deploy with remote debug option in the debug menu.

[triptych]

Can't wait for this!

[Faless]

Rebased on current master

[akien-mga]

Thanks!