Refactor command menu items deprecated code (#19508)

- Removes the intermediate `CommandMenuItemConfig` /
`CommandConfigContext` / `CommandMenuItemDisplay` abstraction layers,
replacing them with a single `CommandMenuItemRenderer` that renders
directly from the command menu items from the backend
- Eliminates the server-items/ subdirectory by moving its contents
(hooks/, contexts/, states/, display/, edit/) up into the parent
command-menu-item/ module, removing an unnecessary nesting level.

packages/twenty-front/src/modules/command-menu-item/graphql/mutations/updateCommandMenuItem.ts

@@ -0,0 +1,11 @@
+import { COMMAND_MENU_ITEM_FRAGMENT } from '@/command-menu-item/graphql/fragments/commandMenuItemFragment';
+import { gql } from '@apollo/client';
+
+export const UPDATE_COMMAND_MENU_ITEM = gql`
+  ${COMMAND_MENU_ITEM_FRAGMENT}
+  mutation UpdateCommandMenuItem($input: UpdateCommandMenuItemInput!) {
+    updateCommandMenuItem(input: $input) {
+      ...CommandMenuItemFields
+    }
+  }
+`;