Create cleaning script

Author: RedFantom

clean.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+rm libgttk.so
+rm libgttk.dll
+rm CMakeCache.txt
+rm cmake_install.cmake
+rm -rf cmake-build-debug
+rm -rf CMakeFiles
+rm -rf _skbuild
+rm -rf gttk.egg-info