Fix virtual environment activation path on Windows

The setup.sh script was hardcoded to use .venv/bin/activate, which fails
on Windows where Python creates .venv/Scripts/activate instead. This
adds an OSTYPE check to select the correct path on msys/cygwin shells
while preserving the existing behavior on Linux and macOS.

Fixes #129

Author: yuribodo

computer-use-demo/setup.sh

@@ -15,7 +15,11 @@ if ! command -v cargo &> /dev/null; then
 fi
 
 python3 -m venv .venv
-source .venv/bin/activate
+if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" || "$OSTYPE" == "win32" ]]; then
+    source .venv/Scripts/activate
+else
+    source .venv/bin/activate
+fi
 pip install --upgrade pip
 pip install -r dev-requirements.txt
 pre-commit install