Add -v switch

And move VERSION to share/portzap/VERSION

bin/portzap

@@ -40,6 +40,16 @@ require_dependency() {
 
 ##
 # main
+i=1
+while [ "${i}" -le "$#" ]; do
+    eval "_portzap_option=\$${i}"
+    if [ "${_portzap_option}" = "-v" ]; then
+        echo $(cat "${rootdir}"/../share/portzap/VERSION)
+        exit 0
+    fi
+    i=$(expr "${i}" + 1);
+done
+
 case $1 in
     "clone")
         require_dependency "git doas"