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/mode_indicator.rs

@@ -88,12 +88,19 @@ impl Render for ModeIndicator {
             return div().into_any();
         };
 
+        let vim_readable = vim.read(cx);
+        let mode = if vim_readable.temp_mode {
+            format!("(insert) {}", vim_readable.mode)
+        } else {
+            vim_readable.mode.to_string()
+        };
+
         let current_operators_description = self.current_operators_description(vim.clone(), cx);
         let pending = self
             .pending_keys
             .as_ref()
             .unwrap_or(&current_operators_description);
-        Label::new(format!("{} -- {} --", pending, vim.read(cx).mode))
+        Label::new(format!("{} -- {} --", pending, mode))
             .size(LabelSize::Small)
             .line_height_style(LineHeightStyle::UiLabel)
             .into_any_element()