Only ask to install git hook if it doesn't exist (#2129)

setup-dev.sh

@@ -28,7 +28,7 @@ exit $exit_code
 EOF
 )
 
-if [ -t 1 ]; then
+if [ -t 1 ] && [ ! -f $hook_script_path ]; then
     echo "Install a git hook to automatically lint files before pushing? (y/N)"
     read yn
     if [[ "$yn" == [Yy]* ]]; then
@@ -227,4 +227,4 @@ if linux; then
 
     source "${PWNDBG_VENV_PATH}/bin/activate"
     ~/.local/bin/poetry install --with dev
-fi
+fi