feat: theme card component aangemaakt

frontend/src/utils/constants.ts

@@ -0,0 +1,22 @@
+import { ref } from "vue";
+
+export const THEMESITEMS = ref([
+    "all-themes",
+    "culture",
+    "electricity-and-mechanics",
+    "nature-and-climate",
+    "agriculture",
+    "society",
+    "math",
+    "technology",
+    "algorithms",
+]);
+
+export const AGEITEMS = ref([
+    "all-ages",
+    "primary-school",
+    "lower-secondary",
+    "upper-secondary",
+    "high-school",
+    "older",
+]);