chore: bump version to 0.3.0

Author: blackwell-systems

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "gcf-python"
-version = "0.2.0"
+version = "0.3.0"
 description = "Python implementation of GCF (Graph Compact Format): token-optimized wire format for LLM tool responses"
 readme = "README.md"
 license = {text = "MIT"}