Add BASIC language extension

[nathanchere]

Re: your checklist

License is MIT
extensions.toml and .gitmodules sorted with pnpm sort-extensions
Submodule uses HTTP URL (https://gitlab.com/nathanchere/zed-basic)

[nathanchere]

I've read both https://zed.dev/docs/extensions/developing-extensions#extension-publishing-prerequisites and https://zed.dev/docs/extensions/developing-extensions#publishing-your-extension
Am I missing something else? Seems like a lot of other PRs for extensions getting merged or at least closed with a reason while this is showing no signs of anything beyond bot activity. I see some PRs for new extensions getting at least reviewed same-day, while others are sitting there for 6+ months without anything other than the CLA bot activity. I know BASIC is a pretty niche domain in 2026 but is there some weird trick to avoiding having the PR join the 6 month dormant club?

[nathanchere]

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