Keymap oneliners (#13887)

This is should be a no-op, whitespace formatting only.
Removes 425 lines of excess whitespace in our default keymap json files.

Release Notes:

- Improved formatting of default keymaps (single line per bind)

.zed/settings.json

@@ -14,6 +14,12 @@
     },
     "JSON": {
       "tab_size": 2,
+      "preferred_line_length": 100,
+      "formatter": "prettier"
+    },
+    "JSONC": {
+      "tab_size": 2,
+      "preferred_line_length": 100,
       "formatter": "prettier"
     },
     "JavaScript": {