Restructure MVC into public/src layout

Co-authored-by: LeOSW42 <673670+LeOSW42@users.noreply.github.com>

src/Core/database.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Kabano;
+
+function sql_connect() {
+	global $config;
+
+	$connection = "host=".$config['SQL_host']
+		." dbname=".$config['SQL_db']
+		." user=".$config['SQL_user']
+		." password=".$config['SQL_pass'];
+
+	$con = pg_connect($connection);
+	if (!$con) {
+		$error = error_get_last();
+		$message = $error && isset($error['message']) ? $error['message'] : "unknown error";
+		die("Could not connect to server: ".$message."\n");
+	}
+
+	return $con;
+}