Added whats new for 3.18.0

whats-new/3-18-0.html

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+<h2>Tabular Editor 3.18.0</h2>
+<p>Release blog: <a href="https://blog.tabulareditor.com/2024/10/30/tabular-editor-3-october-2024-release/">October 2024</a> (v. 3.18.0, <a href="https://docs.tabulareditor.com/te3/other/release-notes/3_18_0.html">release notes</a>)</p>
+<ul>
+    <li>DAX Optimzer integration is GA and includes 4 free runs per day for Enterprise Edition Customers</li>
+    <li>One-click DAX improvements and refactoring with<a href="https://docs.tabulareditor.com/te3/features/code-actions"></a> the new code actions</li>
+    <li>New Authentication mode: Microsoft Entra MFA</li>
+    <li>Customize how Auto-exists work with the new model property 'Value Filter behavior'</li>
+    <li>Set your own number of recent items in the preferences - default is 10</li>
+    <li>Fixed several bugs including ensuring support for FormatString measures in DAX Queries</li>
+    <li><a href="https://docs.tabulareditor.com/te3/other/release-notes/3_18_0.html">And more...</a></li>
+</ul>