fix(striker-ui): add helper functions to work with time

striker-ui/lib/time.ts

@@ -0,0 +1,23 @@
+const before = (time: number, limit: number): boolean => {
+  const diff = time - limit;
+
+  return diff > 0;
+};
+
+const last = (
+  time: number,
+  duration: number,
+  { ms }: { ms?: boolean } = {},
+): boolean => {
+  let now = Date.now();
+
+  if (!ms) {
+    now /= 1000;
+  }
+
+  const diff = now - time;
+
+  return diff <= duration;
+};
+
+export { before, last };