git: Enable git stash in git panel (#32821)

Related discussion #31484

Release Notes:

- Added a menu entry on the git panel to git stash and git pop stash. 

Preview: 


![Screenshot-2025-06-17_08:26:36](https://github.com/user-attachments/assets/d3699ba4-511f-4c7b-a7cc-00a295d01f64)

---------

Co-authored-by: Cole Miller <cole@zed.dev>

crates/git/src/git.rs

@@ -55,6 +55,10 @@ actions!(
         StageAll,
         /// Unstages all changes in the repository.
         UnstageAll,
+        /// Stashes all changes in the repository, including untracked files.
+        StashAll,
+        /// Pops the most recent stash.
+        StashPop,
         /// Restores all tracked files to their last committed state.
         RestoreTrackedFiles,
         /// Moves all untracked files to trash.

crates/git/src/repository.rs

@@ -395,6 +395,14 @@ pub trait GitRepository: Send + Sync {
         env: Arc<HashMap<String, String>>,
     ) -> BoxFuture<'_, Result<()>>;
 
+    fn stash_paths(
+        &self,
+        paths: Vec<RepoPath>,
+        env: Arc<HashMap<String, String>>,
+    ) -> BoxFuture<Result<()>>;
+
+    fn stash_pop(&self, env: Arc<HashMap<String, String>>) -> BoxFuture<Result<()>>;
+
     fn push(
         &self,
         branch_name: String,
@@ -1189,6 +1197,55 @@ impl GitRepository for RealGitRepository {
             .boxed()
     }
 
+    fn stash_paths(
+        &self,
+        paths: Vec<RepoPath>,
+        env: Arc<HashMap<String, String>>,
+    ) -> BoxFuture<Result<()>> {
+        let working_directory = self.working_directory();
+        self.executor
+            .spawn(async move {
+                let mut cmd = new_smol_command("git");
+                cmd.current_dir(&working_directory?)
+                    .envs(env.iter())
+                    .args(["stash", "push", "--quiet"])
+                    .arg("--include-untracked");
+
+                cmd.args(paths.iter().map(|p| p.as_ref()));
+
+                let output = cmd.output().await?;
+
+                anyhow::ensure!(
+                    output.status.success(),
+                    "Failed to stash:\n{}",
+                    String::from_utf8_lossy(&output.stderr)
+                );
+                Ok(())
+            })
+            .boxed()
+    }
+
+    fn stash_pop(&self, env: Arc<HashMap<String, String>>) -> BoxFuture<Result<()>> {
+        let working_directory = self.working_directory();
+        self.executor
+            .spawn(async move {
+                let mut cmd = new_smol_command("git");
+                cmd.current_dir(&working_directory?)
+                    .envs(env.iter())
+                    .args(["stash", "pop"]);
+
+                let output = cmd.output().await?;
+
+                anyhow::ensure!(
+                    output.status.success(),
+                    "Failed to stash pop:\n{}",
+                    String::from_utf8_lossy(&output.stderr)
+                );
+                Ok(())
+            })
+            .boxed()
+    }
+
     fn commit(
         &self,
         message: SharedString,