Add branch rename action to Git panel (#38273)

Reopening #35136, cc @launay12u

Release Notes:

- git: added `git: rename branch` action to rename a branch (`git branch
-m`)

---------

Co-authored-by: Guillaume Launay <guillaume.launay@paylead.fr>
Co-authored-by: Peter Tripp <petertripp@gmail.com>

crates/git/src/git.rs

@@ -11,6 +11,7 @@ pub use crate::remote::*;
 use anyhow::{Context as _, Result};
 pub use git2 as libgit;
 use gpui::{Action, actions};
+pub use repository::RemoteCommandOutput;
 pub use repository::WORK_DIRECTORY_REPO_PATH;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -101,6 +102,18 @@ actions!(
     ]
 );
 
+/// Renames a git branch.
+#[derive(Clone, Debug, Default, PartialEq, Deserialize, JsonSchema, Action)]
+#[action(namespace = git)]
+#[serde(deny_unknown_fields)]
+pub struct RenameBranch {
+    /// The branch to rename.
+    ///
+    /// Default: the current branch.
+    #[serde(default)]
+    pub branch: Option<String>,
+}
+
 /// Restores a file to its last committed state, discarding local changes.
 #[derive(Clone, Debug, Default, PartialEq, Deserialize, JsonSchema, Action)]
 #[action(namespace = git, deprecated_aliases = ["editor::RevertFile"])]