Merge analog clock into index and add fullscreen toggle

clock.js

@@ -81,4 +81,10 @@ window.addEventListener('load',()=>{
   placeMarkers();
   updateClock();
   setInterval(updateClock,1000);
+  const clk=document.getElementById('clock');
+  if(clk){
+    clk.addEventListener('click',()=>{
+      document.body.classList.toggle('fullscreen-clock');
+    });
+  }
 });