feat: add admin, company, and student dashboard pages with initial template structure

frontend/app/pages/dashboard/admin.vue

@@ -0,0 +1,3 @@
+<template>
+    <div></div>
+</template>

frontend/app/pages/dashboard/company.vue

@@ -0,0 +1,3 @@
+<template>
+    <div></div>
+</template>

frontend/app/pages/dashboard/index.vue

@@ -1,3 +1,20 @@
+<script setup lang="ts">
+import { Role } from '~/types/role';
+import type { User } from '~/types/user';
+
+const user = useSanctumUser<User>();
+const router = useRouter();
+
+onMounted(() => {
+    if (user.value?.role === Role.ADMIN) {
+        router.push('/dashboard/admin');
+    } else if (user.value?.role === Role.STUDENT) {
+        router.push('/dashboard/student');
+    }
+});
+</script>
+
 <template>
-    <div></div>
+    <div>
+    </div>
 </template>

frontend/app/pages/dashboard/student.vue

@@ -0,0 +1,3 @@
+<template>
+    <div></div>
+</template>