SSH remote search (#16915)

Co-Authored-By: Max <max@zed.dev>

Release Notes:

- ssh remoting: add project search

---------

Co-authored-by: Max <max@zed.dev>

crates/proto/proto/zed.proto

@@ -275,7 +275,10 @@ message Envelope {
         GetLlmTokenResponse get_llm_token_response = 236;
 
         LspExtSwitchSourceHeader lsp_ext_switch_source_header = 241;
-        LspExtSwitchSourceHeaderResponse lsp_ext_switch_source_header_response = 242; // current max
+        LspExtSwitchSourceHeaderResponse lsp_ext_switch_source_header_response = 242;
+
+        FindSearchCandidates find_search_candidates = 243;
+        FindSearchCandidatesResponse find_search_candidates_response = 244; // current max
     }
 
     reserved 158 to 161;
@@ -1236,6 +1239,26 @@ message SearchProjectResponse {
     bool limit_reached = 2;
 }
 
+message SearchQuery {
+    string query = 2;
+    bool regex = 3;
+    bool whole_word = 4;
+    bool case_sensitive = 5;
+    string files_to_include = 6;
+    string files_to_exclude = 7;
+    bool include_ignored = 8;
+}
+
+message FindSearchCandidates {
+    uint64 project_id = 1;
+    SearchQuery query = 2;
+    uint64 limit = 3;
+}
+
+message FindSearchCandidatesResponse {
+    repeated uint64 buffer_ids = 1;
+}
+
 message CodeAction {
     uint64 server_id = 1;
     Anchor start = 2;

crates/proto/src/proto.rs

@@ -410,6 +410,8 @@ messages!(
     (LspExtSwitchSourceHeaderResponse, Background),
     (AddWorktree, Foreground),
     (AddWorktreeResponse, Foreground),
+    (FindSearchCandidates, Background),
+    (FindSearchCandidatesResponse, Background)
 );
 
 request_messages!(
@@ -498,6 +500,7 @@ request_messages!(
     (RespondToContactRequest, Ack),
     (SaveBuffer, BufferSaved),
     (SearchProject, SearchProjectResponse),
+    (FindSearchCandidates, FindSearchCandidatesResponse),
     (SendChannelMessage, SendChannelMessageResponse),
     (SetChannelMemberRole, Ack),
     (SetChannelVisibility, Ack),
@@ -547,6 +550,7 @@ entity_messages!(
     CreateProjectEntry,
     DeleteProjectEntry,
     ExpandProjectEntry,
+    FindSearchCandidates,
     FormatBuffers,
     GetCodeActions,
     GetCompletions,