Implement collaborative git manipulations (#23869)

Now commit, stage and unstage can be done both via remote ssh and via
collab (by guests with write access).



https://github.com/user-attachments/assets/a0f5e4e8-01a3-402b-a1f7-f3fc1236cffd


Release Notes:

- N/A

crates/proto/proto/zed.proto

@@ -308,6 +308,10 @@ message Envelope {
         GetStagedTextResponse get_staged_text_response = 289;
 
         RegisterBufferWithLanguageServers register_buffer_with_language_servers = 290;
+
+        Stage stage = 293;
+        Unstage unstage = 294;
+        Commit commit = 295; // current max
     }
 
     reserved 87 to 88;
@@ -2633,3 +2637,24 @@ message RegisterBufferWithLanguageServers{
     uint64 project_id = 1;
     uint64 buffer_id = 2;
 }
+
+message Stage {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    repeated string paths = 4;
+}
+
+message Unstage {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    repeated string paths = 4;
+}
+
+message Commit {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    string message = 4;
+}

crates/proto/src/proto.rs

@@ -156,6 +156,7 @@ messages!(
     (CancelCall, Foreground),
     (ChannelMessageSent, Foreground),
     (ChannelMessageUpdate, Foreground),
+    (Commit, Background),
     (ComputeEmbeddings, Background),
     (ComputeEmbeddingsResponse, Background),
     (CopyProjectEntry, Foreground),
@@ -288,6 +289,7 @@ messages!(
     (ShareProject, Foreground),
     (ShareProjectResponse, Foreground),
     (ShowContacts, Foreground),
+    (Stage, Background),
     (StartLanguageServer, Foreground),
     (SubscribeToChannels, Foreground),
     (SynchronizeBuffers, Foreground),
@@ -297,6 +299,7 @@ messages!(
     (Test, Foreground),
     (Unfollow, Foreground),
     (UnshareProject, Foreground),
+    (Unstage, Background),
     (UpdateBuffer, Foreground),
     (UpdateBufferFile, Foreground),
     (UpdateChannelBuffer, Foreground),
@@ -387,6 +390,7 @@ request_messages!(
     ),
     (Call, Ack),
     (CancelCall, Ack),
+    (Commit, Ack),
     (CopyProjectEntry, ProjectEntryResponse),
     (ComputeEmbeddings, ComputeEmbeddingsResponse),
     (CreateChannel, CreateChannelResponse),
@@ -463,6 +467,7 @@ request_messages!(
     (RespondToChannelInvite, Ack),
     (RespondToContactRequest, Ack),
     (SaveBuffer, BufferSaved),
+    (Stage, Ack),
     (FindSearchCandidates, FindSearchCandidatesResponse),
     (SendChannelMessage, SendChannelMessageResponse),
     (SetChannelMemberRole, Ack),
@@ -471,6 +476,7 @@ request_messages!(
     (SynchronizeBuffers, SynchronizeBuffersResponse),
     (TaskContextForLocation, TaskContext),
     (Test, Test),
+    (Unstage, Ack),
     (UpdateBuffer, Ack),
     (UpdateParticipantLocation, Ack),
     (UpdateProject, Ack),
@@ -516,6 +522,7 @@ entity_messages!(
     BufferReloaded,
     BufferSaved,
     CloseBuffer,
+    Commit,
     CopyProjectEntry,
     CreateBufferForPeer,
     CreateProjectEntry,
@@ -556,10 +563,12 @@ entity_messages!(
     ResolveCompletionDocumentation,
     ResolveInlayHint,
     SaveBuffer,
+    Stage,
     StartLanguageServer,
     SynchronizeBuffers,
     TaskContextForLocation,
     UnshareProject,
+    Unstage,
     UpdateBuffer,
     UpdateBufferFile,
     UpdateDiagnosticSummary,