Add Typescript boilerplate

src/main.ts

@@ -0,0 +1,34 @@
+/**
+ * Some predefined delay values (in milliseconds).
+ */
+export enum Delays {
+  Short = 500,
+  Medium = 2000,
+  Long = 5000,
+}
+
+/**
+ * Returns a Promise<string> that resolves after a given time.
+ *
+ * @param {string} name - A name.
+ * @param {number=} [delay=Delays.Medium] - A number of milliseconds to delay resolution of the Promise.
+ * @returns {Promise<string>}
+ */
+function delayedHello(
+  name: string,
+  delay: number = Delays.Medium,
+): Promise<string> {
+  return new Promise((resolve: (value?: string) => void) =>
+    setTimeout(() => resolve(`Hello, ${name}`), delay),
+  );
+}
+
+// Please see the comment in the .eslintrc.json file about the suppressed rule!
+// Below is an example of how to use ESLint errors suppression. You can read more
+// at https://eslint.org/docs/latest/user-guide/configuring/rules#disabling-rules
+
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
+export async function greeter(name: any) { // eslint-disable-line @typescript-eslint/no-explicit-any
+  // The name parameter should be of type string. Any is used only to trigger the rule.
+  return await delayedHello(name, Delays.Long);
+}