♻️ Move from .vue files to Lucide for icons

src/components/bottom-navbar.vue

@@ -1,7 +1,5 @@
 <script setup>
-import CalendarIcon from "./icons/calendar-icon.vue";
-import BellIcon from "./icons/bell-icon.vue";
-import ClockIcon from "./icons/clock-icon.vue";
+import { CalendarIcon, BellIcon, ClockIcon } from "lucide-vue-next";
 import { RouterLink } from "vue-router";
 </script>
 
@@ -9,19 +7,19 @@ import { RouterLink } from "vue-router";
   <div class="bottomnav">
     <div class="entry">
       <RouterLink to="/timetable">
-        <CalendarIcon class="icon" />
+        <CalendarIcon size="30" class="icon" />
         <span class="title">{{ $t("title.timetable") }}</span>
       </RouterLink>
     </div>
     <div class="entry">
       <RouterLink to="/substitutions">
-        <BellIcon class="icon" />
+        <BellIcon size="30" class="icon" />
         <span class="title">{{ $t("title.substitutions") }}</span>
       </RouterLink>
     </div>
     <div class="entry">
       <RouterLink to="/history">
-        <ClockIcon class="icon" />
+        <ClockIcon size="30" class="icon" />
         <span class="title">{{ $t("title.history") }}</span>
       </RouterLink>
     </div>