Feature: IDE extensions

[woodruffw]

Pre-submission checks

• I am not reporting a bug (crash, false positive/negative, etc). These must be filed via the bug report template.
• I have looked through the open issues for a duplicate request.

What's the problem this feature will solve?

It would be nice to have zizmor integrate richly into IDEs like VS Code.

This has a few moving parts:

• For full generality, zizmor would need a LSP implementation (e.g. zizmor lsp or zizmor --lsp). This would allow any IDE with LSP support to present rich zizmor results.
• OTOH, we could probably cover >90% of user cases by building one-off extensions for VS Code/Sublime/etc. This would be a lot simpler, at least until we need/want to support >3 IDEs.

This needs more discussion/thought. Feedback welcome!

Describe the solution you'd like

See above.

Additional context

No response