feat(dm): add dashboard with oauth, dice, initiative, open5e, notes

.env.example

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+# OAuth - VK ID
+# Register at https://id.vk.com/about/business/go/
+VK_CLIENT_ID=
+VK_CLIENT_SECRET=
+
+# OAuth - Yandex
+# Register at https://oauth.yandex.com/
+YANDEX_CLIENT_ID=
+YANDEX_CLIENT_SECRET=
+
+# Database
+DATABASE_URL=postgresql://dmuser:dmpass@localhost:5432/dmdashboard
+
+# JWT
+JWT_SECRET=your-jwt-secret-min-32-chars