Store documentation file in configurable directory

[DenTray]

Need to prepare package for ability to store more than one documentation file at the same time. For it we need to make the following:

• Local and Storage drivers should have new config, named directory with the default value documentations
• the production_path config for Local and Storage drivers should be renamed to base_file_name with the default value documentation (without .json extension)
• documentation file extension should be automatically extended by the .json extension
• Local driver should check if directory exists and create it if not (on documentation saving)
• Storage driver should create storage directory only for non Cloud drivers (on documentation saving)
• Config version should be increased to force developers republish package config

[DenTray]

@hans-thomas please assign task to yourself if you'll proceed with this task

[hans-thomas]

Hi @DenTray, I don't have the permission to assign myself for this issue.