vim: Add support for temporary normal mode (ctrl-o) within insert mode (#19454)

Support has been added for the ctrl-o command within insert mode. Ctrl-o
is used to partially enter normal mode for 1 motion to then return back
into insert mode.

Release Notes:

- vim: Added support for `ctrl-o` in insert mode to enter temporary
normal mode

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/vim/src/normal.rs

@@ -185,6 +185,8 @@ impl Vim {
                 error!("Unexpected normal mode motion operator: {:?}", operator)
             }
         }
+        // Exit temporary normal mode (if active).
+        self.exit_temporary_normal(cx);
     }
 
     pub fn normal_object(&mut self, object: Object, cx: &mut ViewContext<Self>) {
@@ -483,6 +485,12 @@ impl Vim {
             });
         });
     }
+
+    fn exit_temporary_normal(&mut self, cx: &mut ViewContext<Self>) {
+        if self.temp_mode {
+            self.switch_mode(Mode::Insert, true, cx);
+        }
+    }
 }
 #[cfg(test)]
 mod test {