Plugin SDK: add full bundled subpath wiring

src/plugin-sdk/llm-task.ts

@@ -0,0 +1,5 @@
+// Narrow plugin-sdk surface for the bundled llm-task plugin.
+// Keep this list additive and scoped to symbols used under extensions/llm-task.
+
+export { resolvePreferredOpenClawTmpDir } from "../infra/tmp-openclaw-dir.js";
+export type { AnyAgentTool, OpenClawPluginApi } from "../plugins/types.js";