This PR makes it so extensions can provide values for the `language_ids`
method on the `LspAdapter` trait.
These are provided as data in the `language_servers` section of the
`extension.toml`, like so:
```toml
[language_servers.intelephense]
name = "Intelephense"
language = "PHP"
language_ids = { PHP = "php"}
```
Release Notes:
- N/A
Co-authored-by: Max <max@zed.dev>
39cc3c0778