Build separate native and WASI pipelines with shared multicall names

Checkpoint before integration and package validation.

Assisted-by: SurmAgent:unknown [read] [edit] [bash]

userland/qjs/source/examples/hello_module.js

@@ -0,0 +1,6 @@
+/* example of JS module */
+
+import { fib } from "./fib_module.js";
+
+console.log("Hello World");
+console.log("fib(10)=", fib(10));