feat(actions-exec-wrapper): add type support

packages/actions-exec-wrapper/types/index.d.ts

@@ -0,0 +1,14 @@
+/**
+ * @description Runs a given CLI command and return's it's standard output(stdout)
+ * @param command The command to be run
+ * @returns Command output wrapped around a promise
+ * @example
+ * exec("npm --version")
+ * .then((result) => {
+ *   console.log(result);
+ * })
+ * .catch((error) => {
+ *   console.log(error);
+ * });
+ */
+export default function execute(command: string): Promise<string>;