Git push/pull/fetch (#25445)

Release Notes:

- N/A

---------

Co-authored-by: Michael Sloan <mgsloan@gmail.com>

crates/proto/proto/zed.proto

@@ -321,7 +321,13 @@ message Envelope {
         GitCommitDetails git_commit_details = 302;
 
         SetIndexText set_index_text = 299;
-        GitCheckoutFiles git_checkout_files = 303; // current max
+        GitCheckoutFiles git_checkout_files = 303;
+
+        Push push = 304;
+        Fetch fetch = 305;
+        GetRemotes get_remotes = 306;
+        GetRemotesResponse get_remotes_response = 307;
+        Pull pull = 308; // current max
     }
 
     reserved 87 to 88;
@@ -2772,3 +2778,46 @@ message OpenCommitMessageBuffer {
     uint64 worktree_id = 2;
     uint64 work_directory_id = 3;
 }
+
+message Push {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    string remote_name = 4;
+    string branch_name = 5;
+    optional PushOptions options = 6;
+
+    enum PushOptions {
+        SET_UPSTREAM = 0;
+        FORCE = 1;
+    }
+}
+
+message Fetch {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+}
+
+message GetRemotes {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    optional string branch_name = 4;
+}
+
+message GetRemotesResponse {
+    repeated Remote remotes = 1;
+
+    message Remote {
+        string name = 1;
+    }
+}
+
+message Pull {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    string remote_name = 4;
+    string branch_name = 5;
+}

crates/proto/src/proto.rs

@@ -445,6 +445,11 @@ messages!(
     (GitShow, Background),
     (GitCommitDetails, Background),
     (SetIndexText, Background),
+    (Push, Background),
+    (Fetch, Background),
+    (GetRemotes, Background),
+    (GetRemotesResponse, Background),
+    (Pull, Background),
 );
 
 request_messages!(
@@ -582,6 +587,10 @@ request_messages!(
     (GitReset, Ack),
     (GitCheckoutFiles, Ack),
     (SetIndexText, Ack),
+    (Push, Ack),
+    (Fetch, Ack),
+    (GetRemotes, GetRemotesResponse),
+    (Pull, Ack),
 );
 
 entity_messages!(
@@ -678,6 +687,10 @@ entity_messages!(
     GitReset,
     GitCheckoutFiles,
     SetIndexText,
+    Push,
+    Fetch,
+    GetRemotes,
+    Pull,
 );
 
 entity_messages!(