feat: add sqlstring and supports-color modules

- Introduced sqlstring module for SQL escape and formatting.
- Added supports-color module to detect terminal color support.
- Created dashboard and login views with Bootstrap styling.
- Implemented user schema in SQL with mock data for testing.

backend/node_modules/long/umd/index.d.ts

@@ -0,0 +1,3 @@
+import { Long } from "./types.js";
+export = Long;
+export as namespace Long;