Added timer component

src/assets/i18n/en.json

@@ -8,6 +8,7 @@
     "IMPRINT": "Impressum",
     "PROJECTS": "Projects",
     "ALGORITHMS": "Algorithms",
+    "STOPWATCH": "Stopwatch",
     "SETTINGS": "Settings",
     "LANGUAGE": "Language",
     "APPEARANCE": "Appearance"
@@ -587,5 +588,16 @@
     "ALERT": {
       "NO_SOLUTION": "No solution found (this should not happen for a planar map!)."
     }
+  },
+  "STOPWATCH": {
+    "TITLE": "Stopwatch",
+    "START": "Start",
+    "PAUSE": "Pause",
+    "STOP": "Stop",
+    "RESET": "Reset",
+    "INTERVAL_ENABLED": "Beep at interval",
+    "INTERVAL_MINUTES": "Minutes",
+    "INTERVAL_SECONDS": "Seconds",
+    "INTERVAL_HINT": "Plays a short tone whenever the elapsed time crosses a multiple of the interval."
   }
 }