Update project description in pyproject.toml for clarity and detail

Author: koerper

pyproject.toml

@@ -2,7 +2,7 @@
 name = "milescoder"
 version = "0.1.0"
 authors = [{ name = "Tim Würger", email = "tim.wuerger@hereon.de" }]
-description = "A tool for encoding surface information into a string-based code"
+description = "A Python package for encoding and decoding MILES (Material Input Line Entry System) strings - a standardized notation system for describing comprehensive material properties in a compact, machine-readable format."
 readme = "README.md"
 requires-python = ">=3.9"
 classifiers = [