init backend, added admin page in front

Signed-off-by: Nicolas Froger <nicolas@kektus.xyz>

summer2024-frontend/src/components/ui/form/FormMessage.vue

@@ -0,0 +1,16 @@
+<script setup>
+import { ErrorMessage } from "vee-validate";
+import { toValue } from "vue";
+import { useFormField } from "./useFormField";
+
+const { name, formMessageId } = useFormField();
+</script>
+
+<template>
+  <ErrorMessage
+    :id="formMessageId"
+    as="p"
+    :name="toValue(name)"
+    class="text-sm font-medium text-destructive"
+  />
+</template>