feat(new-tool): added chronometer

src/tools/chronometer/chronometer.service.ts

@@ -0,0 +1,13 @@
+export function formatChronometerTime({ elapsed, msPerUnit = 1 }: { elapsed: number; msPerUnit?: number }) {
+  const elapsedMs = elapsed * msPerUnit;
+
+  const ms = elapsedMs % 1000;
+  const secs = ((elapsedMs - ms) / 1000) % 60;
+  const mins = (((elapsedMs - ms) / 1000 - secs) / 60) % 60;
+  const hrs = (((elapsedMs - ms) / 1000 - secs) / 60 - mins) / 60;
+  const hrsString = hrs > 0 ? `${hrs.toString().padStart(2, '0')}:` : '';
+
+  return `${hrsString}${mins.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}.${ms
+    .toString()
+    .padStart(3, '0')}`;
+}