refactor(tools): split delegate-task constants into category-specific modules

src/tools/delegate-task/builtin-category-definition.ts

@@ -0,0 +1,8 @@
+import type { CategoryConfig } from "../../config/schema"
+
+export type BuiltinCategoryDefinition = {
+  name: string
+  config: CategoryConfig
+  description: string
+  promptAppend: string
+}