[next] Bring in stdlib as artifact (#1666)

pyscript.core/src/stdlib.js

@@ -0,0 +1,33 @@
+/**
+ * Create through Python the pyscript module through
+ * the artifact generated at build time.
+ * This the returned value is a string that must be used
+ * either before a worker execute code or when the module
+ * is registered on the main thread.
+ */
+
+import pyscript from "./stdlib/pyscript.js";
+
+const { entries } = Object;
+
+const python = ["from pathlib import Path as _Path"];
+
+const write = (base, literal) => {
+    for (const [key, value] of entries(literal)) {
+        const path = `_Path("${base}/${key}")`;
+        if (typeof value === "string") {
+            const code = JSON.stringify(value);
+            python.push(`${path}.write_text(${code})`);
+        } else {
+            python.push(`${path}.mkdir(parents=True, exist_ok=True)`);
+            write(`${base}/${key}`, value);
+        }
+    }
+};
+
+write(".", pyscript);
+
+python.push("del _Path");
+python.push("\n");
+
+export default python.join("\n");