Fix git branches in non-active repository (#26148)

Release Notes:

- Git Beta: Fixed a bug where the branch selector would only show for
the first repository opened.

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>
Co-authored-by: Richard Feldman <oss@rtfeldman.com>

crates/proto/proto/zed.proto

@@ -1,3 +1,4 @@
+
 syntax = "proto3";
 package zed.messages;
 
@@ -278,7 +279,6 @@ message Envelope {
         LanguageServerPromptRequest language_server_prompt_request = 268;
         LanguageServerPromptResponse language_server_prompt_response = 269;
 
-        GitBranches git_branches = 270;
         GitBranchesResponse git_branches_response = 271;
 
         UpdateGitBranch update_git_branch = 272;
@@ -332,7 +332,10 @@ message Envelope {
         ApplyCodeActionKind apply_code_action_kind = 309;
         ApplyCodeActionKindResponse apply_code_action_kind_response = 310;
 
-        RemoteMessageResponse remote_message_response = 311; // current max
+        RemoteMessageResponse remote_message_response = 311;
+        GitGetBranches git_get_branches = 312;
+        GitCreateBranch git_create_branch = 313;
+        GitChangeBranch git_change_branch = 314; // current max
     }
 
     reserved 87 to 88;
@@ -348,6 +351,7 @@ message Envelope {
     reserved 221;
     reserved 224 to 229;
     reserved 246;
+    reserved 270;
     reserved 247 to 254;
     reserved 255 to 256;
 }
@@ -2851,3 +2855,23 @@ message RemoteMessageResponse {
     string stdout = 1;
     string stderr = 2;
 }
+
+message GitGetBranches {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+}
+
+message GitCreateBranch {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    string branch_name = 4;
+}
+
+message GitChangeBranch {
+    uint64 project_id = 1;
+    uint64 worktree_id = 2;
+    uint64 work_directory_id = 3;
+    string branch_name = 4;
+}

crates/proto/src/proto.rs

@@ -424,7 +424,7 @@ messages!(
     (FlushBufferedMessages, Foreground),
     (LanguageServerPromptRequest, Foreground),
     (LanguageServerPromptResponse, Foreground),
-    (GitBranches, Background),
+    (GitGetBranches, Background),
     (GitBranchesResponse, Background),
     (UpdateGitBranch, Background),
     (ListToolchains, Foreground),
@@ -452,6 +452,8 @@ messages!(
     (GetRemotesResponse, Background),
     (Pull, Background),
     (RemoteMessageResponse, Background),
+    (GitCreateBranch, Background),
+    (GitChangeBranch, Background),
 );
 
 request_messages!(
@@ -575,7 +577,7 @@ request_messages!(
     (GetPermalinkToLine, GetPermalinkToLineResponse),
     (FlushBufferedMessages, Ack),
     (LanguageServerPromptRequest, LanguageServerPromptResponse),
-    (GitBranches, GitBranchesResponse),
+    (GitGetBranches, GitBranchesResponse),
     (UpdateGitBranch, Ack),
     (ListToolchains, ListToolchainsResponse),
     (ActivateToolchain, Ack),
@@ -594,6 +596,8 @@ request_messages!(
     (Fetch, RemoteMessageResponse),
     (GetRemotes, GetRemotesResponse),
     (Pull, RemoteMessageResponse),
+    (GitCreateBranch, Ack),
+    (GitChangeBranch, Ack),
 );
 
 entity_messages!(
@@ -679,7 +683,7 @@ entity_messages!(
     OpenServerSettings,
     GetPermalinkToLine,
     LanguageServerPromptRequest,
-    GitBranches,
+    GitGetBranches,
     UpdateGitBranch,
     ListToolchains,
     ActivateToolchain,
@@ -695,6 +699,8 @@ entity_messages!(
     Fetch,
     GetRemotes,
     Pull,
+    GitChangeBranch,
+    GitCreateBranch,
 );
 
 entity_messages!(