vim: Add vim counts and vim shortcuts to project_panel (#36653)

Closes #10930 
Closes #11353

Release Notes:

- Adds commands to project_panel
  - `ctrl-u` scrolls the project_panel up half of the visible entries
  - `ctrl-d` scrolls the project_panel down half of the visible entries
  - `z z` scrolls current selection to center of window
  - `z t`  scrolls current selection to top of window
  - `z b` scrolls current selection to bottom of window
  - `{num} j` and `{num} k` now move up and  down with a count

assets/keymaps/vim.json

@@ -884,10 +884,12 @@
       "/": "project_panel::NewSearchInDirectory",
       "d": "project_panel::NewDirectory",
       "enter": "project_panel::OpenPermanent",
-      "escape": "project_panel::ToggleFocus",
+      "escape": "vim::ToggleProjectPanelFocus",
       "h": "project_panel::CollapseSelectedEntry",
-      "j": "menu::SelectNext",
-      "k": "menu::SelectPrevious",
+      "j": "vim::MenuSelectNext",
+      "k": "vim::MenuSelectPrevious",
+      "down": "vim::MenuSelectNext",
+      "up": "vim::MenuSelectPrevious",
       "l": "project_panel::ExpandSelectedEntry",
       "shift-d": "project_panel::Delete",
       "shift-r": "project_panel::Rename",
@@ -906,7 +908,22 @@
       "{": "project_panel::SelectPrevDirectory",
       "shift-g": "menu::SelectLast",
       "g g": "menu::SelectFirst",
-      "-": "project_panel::SelectParent"
+      "-": "project_panel::SelectParent",
+      "ctrl-u": "project_panel::ScrollUp",
+      "ctrl-d": "project_panel::ScrollDown",
+      "z t": "project_panel::ScrollCursorTop",
+      "z z": "project_panel::ScrollCursorCenter",
+      "z b": "project_panel::ScrollCursorBottom",
+      "0": ["vim::Number", 0],
+      "1": ["vim::Number", 1],
+      "2": ["vim::Number", 2],
+      "3": ["vim::Number", 3],
+      "4": ["vim::Number", 4],
+      "5": ["vim::Number", 5],
+      "6": ["vim::Number", 6],
+      "7": ["vim::Number", 7],
+      "8": ["vim::Number", 8],
+      "9": ["vim::Number", 9]
     }
   },
   {