project: Fine-grained language server management (#23708)

This reverts commit d8c9fdd014.

Closes #ISSUE

Release Notes:

- N/A

crates/project/src/prettier_store.rs

@@ -40,7 +40,7 @@ pub struct PrettierStore {
     prettier_instances: HashMap<PathBuf, PrettierInstance>,
 }
 
-pub enum PrettierStoreEvent {
+pub(crate) enum PrettierStoreEvent {
     LanguageServerRemoved(LanguageServerId),
     LanguageServerAdded {
         new_server_id: LanguageServerId,