Add http.png hero image to README [skip ci]

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: d3nd3

README.md

@@ -4,6 +4,8 @@
 [![Build](https://img.shields.io/badge/build-passing-brightgreen.svg)]()
 [![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20Linux-lightgrey.svg)]()
 
+![HTTP map download — missing maps fetched on demand](http.png)
+
 > **A modern enhancement suite for Soldier of Fortune 1 — scaling, fixes, and quality-of-life improvements for the best SoF experience.**
 
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