Add a bit of documentation

Signed-off-by: Juraj Oravec <jurajoravec@mailo.com>

theme_converter.py

@@ -2,6 +2,13 @@
 LICENSE:
 SPDX-FileCopyrightText: 2020 Juraj Oravec <jurajoravec@mailo.com>
 SPDX-License-Identifier: MIT
+
+Configuration:
+- IncludeCustoms: Try to export all available settings
+- prefferStandAloneData: prefferdata set specifically for current datatype
+
+Usage:
+script.py ThemeName themefile.kateschema
 """
 
 from configparser import ConfigParser
@@ -262,7 +269,7 @@ def main(inputFile: str):
 
 if __name__ == "__main__":
     if len(sys.argv) != 3:
-        print("Usage: " + sys.argv[0] + " Name Filepath")
+        print("Usage: " + sys.argv[0] + " ThemeName Filepath.kateschema")
         exit()
 
     jsonConfig["metadata"] = {