Add support for git branches on remote projects (#19755)

Release Notes:

- Fixed a bug where the branch switcher could not be used remotely.

crates/project/src/project.rs

@@ -288,6 +288,13 @@ impl ProjectPath {
             path: self.path.to_string_lossy().to_string(),
         }
     }
+
+    pub fn root_path(worktree_id: WorktreeId) -> Self {
+        Self {
+            worktree_id,
+            path: Path::new("").into(),
+        }
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -701,7 +708,7 @@ impl Project {
 
             let ssh_proto = ssh.read(cx).proto_client();
             let worktree_store =
-                cx.new_model(|_| WorktreeStore::remote(false, ssh_proto.clone(), 0));
+                cx.new_model(|_| WorktreeStore::remote(false, ssh_proto.clone(), SSH_PROJECT_ID));
             cx.subscribe(&worktree_store, Self::on_worktree_store_event)
                 .detach();
 
@@ -3370,6 +3377,25 @@ impl Project {
         worktree.get_local_repo(&root_entry)?.repo().clone().into()
     }
 
+    pub fn branches(
+        &self,
+        project_path: ProjectPath,
+        cx: &AppContext,
+    ) -> Task<Result<Vec<git::repository::Branch>>> {
+        self.worktree_store().read(cx).branches(project_path, cx)
+    }
+
+    pub fn update_or_create_branch(
+        &self,
+        repository: ProjectPath,
+        new_branch: String,
+        cx: &AppContext,
+    ) -> Task<Result<()>> {
+        self.worktree_store()
+            .read(cx)
+            .update_or_create_branch(repository, new_branch, cx)
+    }
+
     pub fn blame_buffer(
         &self,
         buffer: &Model<Buffer>,