Implement Indent & Outdent as operators (#12430)

Release Notes:

- Fixes [#9697](https://github.com/zed-industries/zed/issues/9697).

Implements `>` and `<` with motions and text objects.
Works with repeat action `.`

assets/keymaps/vim.json

@@ -379,8 +379,8 @@
       "r": ["vim::PushOperator", "Replace"],
       "s": "vim::Substitute",
       "shift-s": "vim::SubstituteLine",
-      "> >": "vim::Indent",
-      "< <": "vim::Outdent",
+      ">": ["vim::PushOperator", "Indent"],
+      "<": ["vim::PushOperator", "Outdent"],
       "ctrl-pagedown": "pane::ActivateNextItem",
       "ctrl-pageup": "pane::ActivatePrevItem",
       // tree-sitter related commands
@@ -459,6 +459,18 @@
       "s": "vim::CurrentLine"
     }
   },
+  {
+    "context": "Editor && vim_operator == >",
+    "bindings": {
+      ">": "vim::CurrentLine"
+    }
+  },
+  {
+    "context": "Editor && vim_operator == <",
+    "bindings": {
+      "<": "vim::CurrentLine"
+    }
+  },
   {
     "context": "Editor && VimObject",
     "bindings": {