Remove old project search code path, bump min-supported zed version for collaboration (#18404)

Release Notes:

- N/A

crates/proto/proto/zed.proto

@@ -108,8 +108,6 @@ message Envelope {
         PrepareRenameResponse prepare_rename_response = 84;
         PerformRename perform_rename = 85;
         PerformRenameResponse perform_rename_response = 86;
-        SearchProject search_project = 87;
-        SearchProjectResponse search_project_response = 88;
 
         UpdateContacts update_contacts = 89;
         UpdateInviteInfo update_invite_info = 90;
@@ -287,6 +285,7 @@ message Envelope {
         CheckFileExistsResponse check_file_exists_response = 256; // current max
     }
 
+    reserved 87 to 88;
     reserved 158 to 161;
     reserved 166 to 169;
     reserved 224 to 229;
@@ -1238,22 +1237,6 @@ message PerformRenameResponse {
     ProjectTransaction transaction = 2;
 }
 
-message SearchProject {
-    uint64 project_id = 1;
-    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 SearchProjectResponse {
-    repeated Location locations = 1;
-    bool limit_reached = 2;
-}
-
 message SearchQuery {
     string query = 2;
     bool regex = 3;

crates/proto/src/proto.rs

@@ -279,8 +279,6 @@ messages!(
     (SaveBuffer, Foreground),
     (SetChannelMemberRole, Foreground),
     (SetChannelVisibility, Foreground),
-    (SearchProject, Background),
-    (SearchProjectResponse, Background),
     (SendChannelMessage, Background),
     (SendChannelMessageResponse, Background),
     (ShareProject, Foreground),
@@ -454,7 +452,6 @@ request_messages!(
     (RespondToChannelInvite, Ack),
     (RespondToContactRequest, Ack),
     (SaveBuffer, BufferSaved),
-    (SearchProject, SearchProjectResponse),
     (FindSearchCandidates, FindSearchCandidatesResponse),
     (SendChannelMessage, SendChannelMessageResponse),
     (SetChannelMemberRole, Ack),
@@ -541,7 +538,6 @@ entity_messages!(
     ResolveCompletionDocumentation,
     ResolveInlayHint,
     SaveBuffer,
-    SearchProject,
     StartLanguageServer,
     SynchronizeBuffers,
     TaskContextForLocation,