Update versioning policy for editor integration (#12375)
## Summary
Following the stabilization of the Ruff language server, we need to
update our versioning policy to account for any changes in it. This
could be server settings, capability, etc.
This PR also adds a new section for the VS Code extension which is
adopted from [Biome's versioning
policy](https://biomejs.dev/internals/versioning/#visual-studio-code-extension)
for the same.
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Co-authored-by: Zanie Blue <contact@zanie.dev>
