move extension logging/messages from debugging pane to output pane

[GitMensch]

I suggest to move any logging output from the debug pane to a separate (new) output pane "native-debug"; benefits:

• when "printCalls" and/or "showDevDebugOutput" (or log output) is active: much more easy to separate the GDB/application output and the logging (it currently tends to get a bit confusing)
• still can be shown "in parallel" (next to the debug pane)
• would preserve the entries also when debugging ended, which can be useful for bug reports (and also for "just check").

I volunteer to do that, mainly waiting for a go/assignment by @WebFreak001

[GitMensch]

While it is possible to import vscode - using it breaks the backend. When this is done we could easily use an output pane via:

import { OutputChannel,  window } from "vscode";
const LogOutputChannel: OutputChannel = window.createOutputChannel("code-debug");

LogOutputChannel.appendLine(msg);

[GitMensch]

Actually a follow-up to #217.