vim: Add keybindings for resizing docks (#23874)

Closes #23334

This does not follow the exact way that windows are resized in vim.
Normally the command is `ctrl-w >` however this PR uses just `ctrl->`.
This is because I could not find a good way to read in a count like `10
ctrl-w ctrl->`. This is not really a problem since `ctrl->` can be held
down, which, in my opinion, speeds up resizing. I think this is a good
compromise since it improves usability; however, I am concerned that
this is not intuitive. I am looking forward to feedback.

Release Notes:

- Added the following commands 
  - vim::ResizeLeftDock
  - vim::ResizeRightDock
  - vim::ResizeBottomDock
- Added keybinds
  - `ctrl->` for widening left dock
  - `ctrl-<` for narrowing left dock

crates/workspace/src/workspace.rs

@@ -3240,9 +3240,31 @@ impl Workspace {
         }
     }
 
-    pub fn resize_pane(&mut self, axis: gpui::Axis, amount: Pixels, cx: &mut Context<Self>) {
-        self.center
-            .resize(&self.active_pane, axis, amount, &self.bounds);
+    pub fn resize_pane(
+        &mut self,
+        axis: gpui::Axis,
+        amount: Pixels,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let docks = self.all_docks();
+        let active_dock = docks
+            .into_iter()
+            .find(|dock| dock.focus_handle(cx).contains_focused(window, cx));
+
+        if let Some(dock) = active_dock {
+            let Some(panel_size) = dock.read(cx).active_panel_size(window, cx) else {
+                return;
+            };
+            match dock.read(cx).position() {
+                DockPosition::Left => resize_left_dock(panel_size + amount, self, window, cx),
+                DockPosition::Bottom => resize_bottom_dock(panel_size + amount, self, window, cx),
+                DockPosition::Right => resize_right_dock(panel_size + amount, self, window, cx),
+            }
+        } else {
+            self.center
+                .resize(&self.active_pane, axis, amount, &self.bounds);
+        }
         cx.notify();
     }