feat: added new class "Timeline.php" and "bricks.xml"

Related: #1

bricks.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<quiqqer>
+    <bricks>
+        <!-- available standard bricks -->
+        <brick control="\QUI\Timeline\Bricks\Timeline">
+
+            <title>
+                <locale group="quiqqer/timeline" var="brick.timeline.title"/>
+            </title>
+            <description>
+                <locale group="quiqqer/timeline" var="brick.timeline.description"/>
+            </description>
+
+            <settings>
+                <setting name="site" data-qui="controls/projects/project/site/Select">
+                    <locale group="quiqqer/timeline" var="brick.timeline.setting.site"/>
+                </setting>
+            </settings>
+
+        </brick>
+
+    </bricks>
+</quiqqer>

src/QUI/Timeline/Bricks/Timeline.php

+<?php
+
+/**
+ * This file contains QUI\Timeline\Bricks\Timeline
+ */
+
+namespace QUI\Timeline\Bricks;
+
+use QUI;
+use QUI\Projects\Site\Utils;
+
+/**
+ * Class Timeline
+ *
+ * @package quiqqer/timeline
+ */
+class Timeline extends QUI\Control
+{
+
+
+}