Allow to temporarily stop LSP servers (#28034)

Same as `editor::RestartLanguageServer`, now there's an
`editor::StopLanguageServer` action that stops all language servers,
related to the currently opened editor.

Opening another singleton editor with the same language or changing
selections in a multi buffer will bring the servers back up.

Release Notes:

- Added a way to temporarily stop LSP servers

---------

Co-authored-by: Michael Sloan <mgsloan@gmail.com>

crates/project/src/project.rs

@@ -3015,6 +3015,16 @@ impl Project {
         })
     }
 
+    pub fn stop_language_servers_for_buffers(
+        &mut self,
+        buffers: Vec<Entity<Buffer>>,
+        cx: &mut Context<Self>,
+    ) {
+        self.lsp_store.update(cx, |lsp_store, cx| {
+            lsp_store.stop_language_servers_for_buffers(buffers, cx)
+        })
+    }
+
     pub fn cancel_language_server_work_for_buffers(
         &mut self,
         buffers: impl IntoIterator<Item = Entity<Buffer>>,