feat(plugin): add systemCode option to root Tool Kit options

Author: ivomurrell

lib/plugin/src/root-schema.ts

@@ -1,6 +1,11 @@
 import * as z from 'zod'
 
 export const RootSchema = z.object({
-  allowNativeFetch: z.boolean().default(false)
+  allowNativeFetch: z.boolean().default(false),
+  // TODO:IM:20251112 require this option in a future major version
+  systemCode: z
+    .string()
+    .optional()
+    .describe('Biz Ops system code or the package name prefixed with "npm:" otherwise')
 })
 export type RootOptions = z.infer<typeof RootSchema>