docs: update newly added feature docs

Author: abose

src/assets/default-project/en/Newly_added_features.md

@@ -7,6 +7,22 @@ We are continuously adding features every week to improve the life of web develo
 
 Here's a list of top features recently added to Phoenix:
 
+<h2><a target="_blank" href="https://docs.phcode.dev/docs/editing-text#indent-guide-lines">Indent Guide Lines</a></h2>
+
+Phoenix Code now supports indent guidelines to help you better visualize code structure. This feature can
+be toggled via `View > Indent Guide Lines`.
+
+![image](https://github.com/user-attachments/assets/3d9d0c55-3c9e-4ab3-bbc0-53b563d19e39)
+
+<h2><a target="_blank" href="https://docs.phcode.dev/docs/editing-text#line-height">Customizable Editor Line Height</a></h2>
+
+Theme Settings (`View > Themes...`) now has a new `Line Height` slider. Adjust the editor line height between 1x and 3x to find your
+perfect balance of readability and screen real estate.
+
+Also added a `Get More...` button to the Themes dialog, linking directly to the themes section in Extension Manager.
+
+![image](https://github.com/user-attachments/assets/97a46d9a-e971-401d-8a77-015afa6d5972)
+
 <h2><a target="_blank" href="https://docs.phcode.dev/docs/editing-text/#auto-space-detection">Auto Tab and Spacing Detection</a></h2>
 
 `Added on August, 2024`