#92253

fixes #92253

#92253

#91969

fixes #91416

fixes #34981

A RunOnceScheduler (this.fetchThreadsScheduler) is used to throttle
fetching threads from debug adapters. this.fetchThreadsScheduler is
disposed when a debug adapter is restarted because of:

    this.rawListeners.push(this.fetchThreadsScheduler);

This causes threads to never be fetched after restarting the debug
adapter.

This is fixed by setting this.fetchThreadsScheduler to undefined after
it is disposed. This way, a new RunOnceScheduler is created after
restarting the debug adapter.

Fixes #88784

fixes #87129

fixes #82354

fixes #82354

#81574

This way debug sessions sharing a single repl will all be notified about new
repl elements and UI will be updated.

- recognizes web urls;
- checks that file path exists;
- supports relative to workspace root paths (./foo);
- supports relative to home dir paths (~/foo);
- optional line/column;
- smoke test.

fixes #81303

fixes #55106

Introduced DebugSessionOptions passed to debug.startDebugging which
encapsulated DebugConsoleMode to control this behavior.