chore: bring back icon

Author: programmersd21

README.md

@@ -1,5 +1,7 @@
 # EfficientManim
 
+![Icon](icon/icon.ico)
+
 EfficientManim is a node-based visual IDE for building mathematical animations. It combines a drag-and-drop scene graph with AI-assisted tooling, a structured history system, and a learning-first explanation engine.
 
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@@ -127,4 +129,4 @@ pip install manim PySide6 google-genai pydub requests numpy pdfplumber regex
 ---
 
 ## License
-MIT (see `LICENSE`).
+MIT (see `LICENSE`).