Boilerplate generator and deno tasks for monorepo

lib/fileExists.ts

@@ -0,0 +1,15 @@
+export const fileExists = async (path: string) => {
+  try {
+    await Deno.stat(path);
+    return true;
+  } catch (error) {
+    if (error instanceof Deno.errors.NotFound) {
+      // file or directory does not exist
+      // console.log(error);
+      return false;
+    } else {
+      // unexpected error, maybe permissions, pass it along
+      throw error;
+    }
+  }
+}