Closes#36938
Follow up to https://github.com/zed-industries/zed/pull/36554
When `registerOptions` is `None`, we should fall back instead of
skipping capability registration.
1. `Option<OneOf<bool, T>>`, where `T` is struct – handled in the
attached PR ✅
2. `Option<T>`, where `T` is an enum that can be `Simple(bool)` or
`Options(S)` – this PR ✅
3. `Option<T>`, where `T` is struct – we should fall back to default
values for these options ⚠️
Release Notes:
- Fixed an issue where hover popovers would not appear in language
servers like Java.
Smit Barmase
ea347b0aa1