feat: Provide a language servers console like vscode (#838)

[angelozerr]

feat: Provide a language servers console like vscode (#838)

Fixes #838

To activate LSP console for a given LS, open the Language Servers settings and select message or verbose in the trace combo

After that when LS will be started you will see the lifecycle of the LS (starting stopping, etc)

and the LSP traces on the right.

[angelozerr]

It start sworking! Here a little demo with the LSP console:

Please note that my code is very ugly, so please don't review it. I have aligned the start/stop of language server with LSP4E and now I have the LSP console I have fixed a lot of bugs. For the moment I have never seen some freeze and I have less error traces.

The error kind that I see is:

• the pipe is broken, this error comes from when the pipe is closed and there is a shutdown after, or when the IJ component throws some events (to sa ythat properties or Java files changed).
• there is a warning when I register the toolwindow because I need to do that with Java, because the first time my ToolBarWindow is null.

I have fixed too a problem when you open, close project it will never disconnect to a messahe bus and we will have so many events which was fired.

[angelozerr]

There is this error when I close projetc and LSP consoleis activated #862 but I thik we can live with this error for now

[adietish]

I have a shortcoming where the log output would only show up once I restarted the IDE.

Steps:

1. ASSERT: have a clean build, Trace for Qute and Microprofile are off
2. EXEC: run the IDE and turn both to verbose in the settings
3. EXEC: open the "Language Servers" tool window
4. ASSERT: "Tools for Microprofile" is not running, no output is shown
5. EXEC: edit a java file and see if "Tools for Microprofile" is turned to "started" and see if there's log output

Result:
It doesnt turn to "started" and there's no log output for me. It only works as expected (steps above) once I restart the IDE.
Same is true for "Qute support" for me

Nevertheless, things work well enough to be merged and this PR especially eliminates freezes. Should be thus merged, shortcoming solved afterwards.

LGTM

[angelozerr]

Thanks so much @adietish for your great review, I created your issue at redhat-developer/lsp4ij#21

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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