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/named-placeholders/README.md

@@ -0,0 +1,29 @@
+[![Flattr this git repo](http://api.flattr.com/button/flattr-badge-large.png)](https://flattr.com/submit/auto?user_id=sidorares&url=https://github.com/sidorares/named-placeholders&title=named-placeholders&language=&tags=github&category=software)
+
+[![NPM](https://nodei.co/npm/named-placeholders.png?downloads=true&stars=true)](https://nodei.co/npm/named-placeholders/)
+
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+
+# named-placeholders
+
+compiles "select foo where foo.id = :bar and foo.baz < :baz" into "select foo where foo.id = ? and foo.baz < ?" + ["bar", "baz"]
+
+## usage
+
+```sh
+npm install named-placeholders
+```
+
+see [this mysql2 discussion](https://github.com/sidorares/node-mysql2/issues/117)
+
+```js
+var mysql = require('mysql');
+var toUnnamed = require('named-placeholders')();
+
+var q = toUnnamed('select 1+:test', { test: 123});
+mysql.createConnection().query(q[0], q[1]);
+```
+
+## credits
+
+parser is based on @mscdex code of his excellent [node-mariasql](https://github.com/mscdex/node-mariasql) library