vim: Add :norm support (#33232)

Closes #21198

Release Notes:

- Adds support for `:norm`
- Allows for vim and zed style modified keys specified in issue
  - Vim style <C-w> and zed style <ctrl-w>
- Differs from vim in how multi-line is handled 
  - vim is sequential
  - zed is combinational (with multi-cursor)

crates/vim/src/insert.rs

@@ -21,7 +21,7 @@ pub fn register(editor: &mut Editor, cx: &mut Context<Vim>) {
 }
 
 impl Vim {
-    fn normal_before(
+    pub(crate) fn normal_before(
         &mut self,
         action: &NormalBefore,
         window: &mut Window,