feat: initial implementation of Oriana uptime monitor

Implements a full-stack uptime monitoring application with:
- HTTPS, HTTPS keyword, HTTPS status, port, and MongoDB Atlas monitor types
- Cron-based monitoring engine with webhook notifications on status changes
- Discord OAuth2 admin panel (single-owner)
- Public status page with category grouping and failure reason display
- Admin dashboard with sortable monitors table and detailed failure info
- SQLite persistence with migration support

eslint.config.js

@@ -0,0 +1,6 @@
+import nhcarrigan from "@nhcarrigan/eslint-config";
+
+export default [
+  { ignores: ["prod/**", "client/**"] },
+  ...nhcarrigan,
+];