move helpers to new workspace folder

packages/helpers/is-object.ts

@@ -0,0 +1,7 @@
+export function isObject<T>(
+  value: T,
+): value is Exclude<T, Primitive | AnyFunction> {
+  return typeof value === "object" && value !== null
+}
+type Primitive = string | number | boolean | undefined | null
+type AnyFunction = (...args: any[]) => any