Test notebook language features

[jrieken]

Refs: #97881

• anyOS @sandy081
• anyOS @Tyriar

Complexity: 3

Create Issue

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We have reworked notebook cells so that different UIs of vscode show them as single notebook node (instead of a node per cell). This is cross cutting and requires sanity testing of the following areas:

1. the markers panels with errors across many cells
2. the peek references view with results across many cells
3. the references view with result across many cells
4. the rename preview with edits across many cells

Also do a quite sanity test of these areas with "normal" files, like a two-file TypeScript project

Use the https://marketplace.visualstudio.com/items?itemName=ms-vscode.vscode-github-issue-notebooks extension to get a notebook with support for diagnostics, rename, reference search. Some sample notebooks: Archive.zip