feat: FRO-2 Implement Login Component (#8)

Reviewed-on: #8
Reviewed-by: lq64 <lq@blackhole.local>
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

src/composables/useUserInfo.ts

@@ -0,0 +1,19 @@
+import { defineStore } from 'pinia'
+import {ref, type Ref} from 'vue'
+
+export const useUserInfo = defineStore('userInfo', () => {
+  const username: Ref<string | null> = ref(null);
+  const userId: Ref<number | null> = ref(null);
+
+  function setUserInfo(name: string, id: number) {
+    username.value = name;
+    userId.value = id;
+  }
+
+  function clearUserInfo() {
+    username.value = null;
+    userId.value = null;
+  }
+
+  return { username, userId, setUserInfo, clearUserInfo };
+});