Add a `.vscode/settings.json` file to exclude some folders from search

[mathjazz]

I wonder if it's worth adding a .vscode/settings.json file to exclude some folders from search? It's still not automated, but you can exclude them in one click.

{
  "search.exclude": {
    "**/.git": true,
    "**/node_modules": true,
    "**/documentation/.cache": true
  }
}

Originally posted by @flodolo in #4050 (comment)

[flodolo]

Probably also "explorer.excludeGitIgnore": true,, since I don't think that's the default.

[eemeli]

This would create a confict for me, as I use

{
  "python.analysis.typeCheckingMode": "standard"
}

in my .vscode/settings.json file.

A better solution would be to make sure that these paths are included in a .ignore file in the Pontoon root, as that's supported by default by rg, ag, as well as VS Code (provided that you've not manually unselected the "Search: Use Ignore Files" setting).

[flodolo]

This would create a confict for me, as I use

Is there a reason not to include that?

[eemeli]

It highlights most Pontoon Python files as having some errors, due to our only very partial type hinting.