Implement embedded Git synchronization TUI

crates/storage/src/config.rs

@@ -71,6 +71,18 @@ impl Config {
         &self.git_remotes
     }
 
+    /// Select a configured remote by name, or the configured default (first
+    /// remote) when no name was requested.
+    pub fn git_remote(&self, requested: Option<&str>) -> Option<&GitRemote> {
+        match requested {
+            Some(name) => self
+                .git_remotes
+                .iter()
+                .find(|remote| remote.name().as_str() == name),
+            None => self.git_remotes.first(),
+        }
+    }
+
     /// Resolve the configured editor, then `$VISUAL`, `$EDITOR`, and finally `vim`.
     pub fn resolve_editor(&self) -> Result<ResolvedEditor, EditorError> {
         self.resolve_editor_from(