open new buffer (#11203)

Release Notes:

- Allow creating new untitled buffers in remote projects

TODO:
- Add a Test
- Fix version number check

crates/rpc/proto/zed.proto

@@ -235,8 +235,9 @@ message Envelope {
         RejoinRemoteProjectsResponse rejoin_remote_projects_response = 187;
 
         RemoteProjectsUpdate remote_projects_update = 193;
-        ValidateRemoteProjectRequest validate_remote_project_request = 194; // Current max
+        ValidateRemoteProjectRequest validate_remote_project_request = 194;
         DeleteDevServer delete_dev_server = 195;
+        OpenNewBuffer open_new_buffer = 196; // Current max
     }
 
     reserved 158 to 161;
@@ -275,6 +276,7 @@ enum ErrorCode {
     DevServerAlreadyOnline = 14;
     DevServerOffline = 15;
     RemoteProjectPathDoesNotExist = 16;
+    RemoteUpgradeRequired = 17;
     reserved 6;
 }
 
@@ -736,6 +738,10 @@ message OpenBufferById {
     uint64 id = 2;
 }
 
+message OpenNewBuffer {
+    uint64 project_id = 1;
+}
+
 message OpenBufferResponse {
     uint64 buffer_id = 1;
 }

crates/rpc/src/proto.rs

@@ -319,7 +319,8 @@ messages!(
     (MultiLspQueryResponse, Background),
     (RemoteProjectsUpdate, Foreground),
     (ValidateRemoteProjectRequest, Background),
-    (DeleteDevServer, Foreground)
+    (DeleteDevServer, Foreground),
+    (OpenNewBuffer, Foreground)
 );
 
 request_messages!(
@@ -377,6 +378,7 @@ request_messages!(
     (OpenBufferById, OpenBufferResponse),
     (OpenBufferByPath, OpenBufferResponse),
     (OpenBufferForSymbol, OpenBufferForSymbolResponse),
+    (OpenNewBuffer, OpenBufferResponse),
     (PerformRename, PerformRenameResponse),
     (Ping, Ack),
     (PrepareRename, PrepareRenameResponse),
@@ -453,6 +455,7 @@ entity_messages!(
     LeaveProject,
     MultiLspQuery,
     OnTypeFormatting,
+    OpenNewBuffer,
     OpenBufferById,
     OpenBufferByPath,
     OpenBufferForSymbol,