refactor: align codebase with EventCrew domain and trim legacy band stack

- Update API: events, users, policies, routes, resources, migrations
- Remove deprecated models/resources (customers, setlists, invitations, etc.)
- Refresh admin app and docs; remove apps/band

Made-with: Cursor

apps/app/src/pages/index.vue

@@ -0,0 +1,25 @@
+<template>
+  <div>
+    <VCard
+      class="mb-6"
+      title="Kick start your project 🚀"
+    >
+      <VCardText>All the best for your new project.</VCardText>
+      <VCardText>
+        Please make sure to read our <a
+          href="https://demos.pixinvent.com/vuexy-vuejs-admin-template/documentation/"
+          target="_blank"
+          rel="noopener noreferrer"
+          class="text-decoration-none"
+        >
+          Template Documentation
+        </a> to understand where to go from here and how to use our template.
+      </VCardText>
+    </VCard>
+
+    <VCard title="Want to integrate JWT? 🔒">
+      <VCardText>We carefully crafted JWT flow so you can implement JWT with ease and with minimum efforts.</VCardText>
+      <VCardText>Please read our  JWT Documentation to get more out of JWT authentication.</VCardText>
+    </VCard>
+  </div>
+</template>