docs: Added @pretch/preact (#1)

Author: EGAMAGZ

src/content/essentials.mdx

@@ -5,4 +5,7 @@
 - [molefrog/wouter](https://github.com/molefrog/wouter) - A minimalist-friendly ~2.1KB routing for React and Preact
 
 ### State Management
-- [preactjs/signals](https://github.com/preactjs/signals) - Manage state with style in every framework 
+- [preactjs/signals](https://github.com/preactjs/signals) - Manage state with style in every framework 
+
+### HTTP Client
+- [@pretch/preact](https://github.com/EGAMAGZ/pretch) -  A lightweight and flexible fetch enhancement library that works with vanilla JavaScript, React, and Preact