Closes#18287
Release Notes:
- Added autocomplete for lsp initialization_options
## Description
This MR adds the following code-changes:
- `initialization_options_schema` to the `LspAdapter` to get JSON
Schema's from the language server
- Adds a post-processing step to inject schema request paths into the
settings schema in `SettingsStore::json_schema`
- Adds an implementation for fetching the schema for rust-analyzer which
fetches it from the binary it is provided with
- Similarly for ruff
<img width="857" height="836" alt="image"
src="https://github.com/user-attachments/assets/3cc10883-364f-4f04-b3b9-3c3881f64252"
/>
## Open Questions(Would be nice to get some advice here)
- Binary Fetching:
- I'm pretty sure the binary fetching is suboptimal. The main problem
here was getting access to the delegate but i figured that out
eventually in a way that i _hope_ should be fine.
- The toolchain and binary options can differ from what the user has
configured potentially leading to mismatches in the autocomplete values
returned(these are probably rarely changed though). I could not really
find a way to fetch these in this context so the provided ones are for
now just `default` values.
- For the trait API it is just provided a binary, since i wanted to use
the potentially cached binary from the CachedLspAdapter. Is that fine
our should the arguments be passed to the LspAdapter such that it can
potentially download the LSP?
- As for those LSPs with JSON schema files in their repositories i can
add the files to zed manually e.g. in
languages/language/initialization_options_schema.json, which could cause
mismatches with the actual binary. Is there a preferred approach for Zed
here also with regards to updating them?
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