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/proto/proto/zed.proto

@@ -367,7 +367,9 @@ message Envelope {
         LanguageServerIdForNameResponse language_server_id_for_name_response = 333; // current max
 
         LoadCommitDiff load_commit_diff = 334;
-        LoadCommitDiffResponse load_commit_diff_response = 335; // current max
+        LoadCommitDiffResponse load_commit_diff_response = 335;
+
+        StopLanguageServers stop_language_servers = 336; // current max
     }
 
     reserved 87 to 88;
@@ -2445,6 +2447,11 @@ message RestartLanguageServers {
     repeated uint64 buffer_ids = 2;
 }
 
+message StopLanguageServers {
+    uint64 project_id = 1;
+    repeated uint64 buffer_ids = 2;
+}
+
 message MultiLspQueryResponse {
     repeated LspResponse responses = 1;
 }

crates/proto/src/proto.rs

@@ -400,6 +400,7 @@ messages!(
     (RespondToChannelInvite, Foreground),
     (RespondToContactRequest, Foreground),
     (RestartLanguageServers, Foreground),
+    (StopLanguageServers, Background),
     (RoomUpdated, Foreground),
     (SaveBuffer, Foreground),
     (SendChannelMessage, Background),
@@ -593,6 +594,7 @@ request_messages!(
     (RejoinRemoteProjects, RejoinRemoteProjectsResponse),
     (MultiLspQuery, MultiLspQueryResponse),
     (RestartLanguageServers, Ack),
+    (StopLanguageServers, Ack),
     (OpenContext, OpenContextResponse),
     (CreateContext, CreateContextResponse),
     (SynchronizeContexts, SynchronizeContextsResponse),
@@ -674,6 +676,7 @@ entity_messages!(
     LoadCommitDiff,
     MultiLspQuery,
     RestartLanguageServers,
+    StopLanguageServers,
     OnTypeFormatting,
     OpenNewBuffer,
     OpenBufferById,