Merges atcommand_athena.conf and help.txt into a single file.
Removed some leftover settings that were removed before.
Removed CLI support for modifying the atcommand configuration file.
Moved atcommand and charcommand symbol definition into conf/battle/gm.conf
Removed some messages that are not needed anymore
Co-authored-by: Aleos <aleos89@users.noreply.github.com>
* Alphabetically sorted includes.
* Updated copyright and license text to match across all files.
* Removed pragma once define in header files in lieu of ifdef guards.
