feat: initial schemas-app implementation

- Add Nuxt 4 application with Vuetify UI framework
- Implement GraphQL schema registry management interface
- Add Apollo Client integration with Auth0 authentication
- Create organization and API key management
- Add schema and ref browsing capabilities
- Implement organization switcher for multi-org users
- Add delete functionality for organizations and API keys
- Create Kubernetes deployment descriptors
- Add Docker configuration with nginx

Features:
- Dashboard with organization overview
- Schema browsing by ref with supergraph viewing
- Ref management with schema details
- Settings page for organizations and API keys
- User list per organization with provider icons
- Admin-only organization creation
- Delete confirmations with warnings

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/components/OrganizationSwitcher.vue

@@ -0,0 +1,42 @@
+<template>
+  <v-menu v-if="organizations.length > 1">
+    <template #activator="{ props }">
+      <v-btn
+        v-bind="props"
+        variant="outlined"
+        prepend-icon="mdi-domain"
+        class="text-none"
+      >
+        {{ selectedOrganization?.name || 'Select Organization' }}
+        <v-icon end>mdi-menu-down</v-icon>
+      </v-btn>
+    </template>
+    <v-list>
+      <v-list-item
+        v-for="org in organizations"
+        :key="org.id"
+        :active="org.id === selectedOrgId"
+        @click="selectOrganization(org.id)"
+      >
+        <v-list-item-title>
+          <v-icon v-if="org.id === selectedOrgId" start size="small">mdi-check</v-icon>
+          {{ org.name }}
+        </v-list-item-title>
+        <template #append>
+          <v-chip size="small" variant="tonal">
+            {{ org.apiKeys?.length || 0 }} keys
+          </v-chip>
+        </template>
+      </v-list-item>
+    </v-list>
+  </v-menu>
+  <v-chip v-else-if="organizations.length === 1" variant="outlined" prepend-icon="mdi-domain">
+    {{ organizations[0].name }}
+  </v-chip>
+</template>
+
+<script setup lang="ts">
+import { useOrganizationSelector } from '~/composables/useOrganizationSelector'
+
+const { organizations, selectedOrganization, selectedOrgId, selectOrganization } = useOrganizationSelector()
+</script>