Group extension settings in the VS Code UI

[shati-patel]

Grouped the extension settings into categories, so you can more easily jump to the right section in the sidebar ⚙

I haven't changed any of the settings, and I've just grouped them roughly based on their name (e.g. codeQL.runningQueries.memory under "Running queries", codeQL.cli.executablePath under "CLI" etc). Happy for alternative suggestions for naming and ordering!

See internal linked issue for more details 👀

Checklist

• CHANGELOG.md has been updated to incorporate all user visible changes made by this pull request.
• Issues have been created for any UI or other user-facing changes made by this pull request.
• [Maintainers only] If this pull request makes user-facing changes that require documentation changes, open a corresponding docs pull request in the github/codeql repo and add the ready-for-doc-review label there.

[shati-patel]

Ok, that broke the config somehow 😅 Will go and figure out what's up with the tests!

[shati-patel]

Ok, that broke the config somehow 😅 Will go and figure out what's up with the tests!

Turns out our test config file read the property keys from the package.json, expecting them to be in a single object under contributes.configuration instead of an array of objects. Thanks to @robertbrignull for helping find and fix that 🙇🏽‍♀️

[robertbrignull]

LGTM