Make tool scripts executable.

tools/generate.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env -S uv run
 """Generate CFFI cdef and Python modules from libaegis C sources."""
 
 import pathlib

tools/release.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env -S uv run
 """Build wheels for all supported Python versions using uv."""
 
 import platform