init: add source code from src.zip

src/commands/vim/index.ts

@@ -0,0 +1,11 @@
+import type { Command } from '../../commands.js'
+
+const command = {
+  name: 'vim',
+  description: 'Toggle between Vim and Normal editing modes',
+  supportsNonInteractive: false,
+  type: 'local',
+  load: () => import('./vim.js'),
+} satisfies Command
+
+export default command