feat: add appkit codemod on-plugins-ready CLI

packages/shared/src/cli/commands/codemod/index.ts

@@ -0,0 +1,17 @@
+import { Command } from "commander";
+import { onPluginsReadyCommand } from "./on-plugins-ready";
+
+/**
+ * Parent command for codemod operations.
+ * Subcommands:
+ *   - on-plugins-ready: Migrate from autoStart/extend/start to onPluginsReady callback
+ */
+export const codemodCommand = new Command("codemod")
+  .description("Run codemods to migrate to newer AppKit APIs")
+  .addCommand(onPluginsReadyCommand)
+  .addHelpText(
+    "after",
+    `
+Examples:
+  $ appkit codemod on-plugins-ready --write`,
+  );