CLASSROOMIO-T-8: Add general calendar

src/components/Navigation/index.svelte

@@ -28,7 +28,7 @@
     </div>
 
     {#if $user.isLoggedIn}
-      <li class="hidden">
+      <li class="">
         <a
           class="block"
           aria-current={segment === undefined || segment === 'dashboard'

src/components/Tailwindcss.svelte

@@ -8,6 +8,10 @@
     --scrollbarBG: #fff;
     --thumbBG: #ccc;
   }
+
+  #calendar .grid {
+    --sc-theme-calendar-colors-background-highlight: var(--main-primary-color);
+  }
   * {
     scrollbar-width: thin;
     scrollbar-color: var(--thumbBG) var(--scrollbarBG);