lib: reinvent find-python.js script

now this script using promises and es6 classes
!!!API HASN'T CHANGE
add documentation
make better logging (colorized output)
make more convenient error handling (one function that catch all errors)

Author: owl-from-hogvarts

lib/find-python-script.py

@@ -1,11 +1,7 @@
-import sys, codecs;
+import sys;
 
 if (sys.stdout.encoding != "utf-8" and sys.platform == "win32"):
-    if sys.version_info > (3, 7):
-        sys.stdout.reconfigure(encoding='utf-8')
-        print(sys.executable)
-    else:
-        sys.stdout = codecs.getwriter("utf8")(sys.stdout)
-        print(sys.executable.decode("cp1251"))
+    sys.stdout.reconfigure(encoding='utf-8')
+    print(sys.executable)
 else:
     print(sys.executable)