project: Track manifest locations per unique manifest locator (#27194)

This pull request paves way for exposing manifest tracking to
extensions.
- Project tree was renamed to manifest tree to better reflect it's
intent (and avoid confusion).
- Language server adapters now provide a name of their *manifest
locator*. If multiple language servers refer to the same locator, the
locating code will run just once for a given path.

Release Notes:

- N/A *or* Added/Fixed/Improved ...

---------

Co-authored-by: Anthony <anthony@zed.dev>

crates/project/src/lsp_store.rs

@@ -6,9 +6,9 @@ use crate::{
     buffer_store::{BufferStore, BufferStoreEvent},
     environment::ProjectEnvironment,
     lsp_command::{self, *},
+    manifest_tree::{AdapterQuery, LanguageServerTree, LaunchDisposition, ManifestTree},
     prettier_store::{self, PrettierStore, PrettierStoreEvent},
     project_settings::{LspSettings, ProjectSettings},
-    project_tree::{AdapterQuery, LanguageServerTree, LaunchDisposition, ProjectTree},
     relativize_path, resolve_path,
     toolchain_store::{EmptyToolchainStore, ToolchainStoreEvent},
     worktree_store::{WorktreeStore, WorktreeStoreEvent},
@@ -3349,7 +3349,7 @@ impl LspStore {
                 sender,
             )
         };
-        let project_tree = ProjectTree::new(worktree_store.clone(), cx);
+        let manifest_tree = ManifestTree::new(worktree_store.clone(), cx);
         Self {
             mode: LspStoreMode::Local(LocalLspStore {
                 weak: cx.weak_entity(),
@@ -3375,7 +3375,7 @@ impl LspStore {
                 _subscription: cx.on_app_quit(|this, cx| {
                     this.as_local_mut().unwrap().shutdown_language_servers(cx)
                 }),
-                lsp_tree: LanguageServerTree::new(project_tree, languages.clone(), cx),
+                lsp_tree: LanguageServerTree::new(manifest_tree, languages.clone(), cx),
                 registered_buffers: Default::default(),
             }),
             last_formatting_failure: None,