fix: console text model uses the language ID

[kittaakos]

What it does

This PR sets the language ID of the console text model based on the currently active text editor. To color the REPL, it is required to have a language for the text model.

There is a caveat between VS Code and Theia; VS Code does not allow users to enter input into the REPL when there are no active debug sessions. Theia allows editing the console input. This difference is out of the scope of this PR.

Closes #9261

How to test

1. Set the REPL input containing keywords from multiple languages.
2. Open a few files from multiple languages.
3. When you change the active editor, the coloring of the REPL text changes. It's like in VS Code.

Theia:

Screen.Recording.2025-02-06.at.11.11.50.mov

VS Code:

Screen.Recording.2025-02-06.at.11.14.56.mov

Follow-ups

Breaking changes

• This PR introduces breaking changes and requires careful review. If yes, the breaking changes section in the changelog has been updated.

Attribution

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[msujew]

I can confirm that this works as expected. However, I believe we're leaking a disposable, see below.

[msujew]

LGTM, thank you.

[tsmaeder]

@kittaakos @msujew should we merge this one?