feat(hello): added hello world contract

Author: Jovonni

templates/hyperweb/src/hello/index.ts

@@ -0,0 +1,12 @@
+export default class Contract {
+    state: {
+        msg?: string | boolean | null;
+    } = {};
+
+    constructor() { }
+
+    hello(x: string) {
+        this.state.msg = x;
+        return `Hello, ${String(this.state.msg)}`;
+    }
+}