feat: change auth to use cookies (#301)

* frontend cookie implementation

* accept cookies for authentication

* remove auth store

* add self attr

frontend/components/App/Header.vue

@@ -1,11 +1,9 @@
 <script lang="ts" setup>
-  import { useAuthStore } from "~~/stores/auth";
-
-  const authStore = useAuthStore();
+  const ctx = useAuthContext();
   const api = useUserApi();
 
   async function logout() {
-    const { error } = await authStore.logout(api);
+    const { error } = await ctx.logout(api);
     if (error) {
       return;
     }