the big one - Complete reorganization of the structure of the script.
Fixed a few bugs:
Files are backed up prior to replacement.
Retroarch configs are now applied by merge instead of replace. We'll set our configurations in the config files, but we won't completely overwrite your configurations. Instead we'll append and update as needed.
Users who have certain special characters in their password will no longer break RetroAchievements.
Added PID lock so script can't run more than once concurrently.
Changed all wget to curl so that users who don't have wget(??) don't have issues.
Added a few new bezels and shaders for RetroArch.
Support more aspect ratios for non-deck devices
use $HOME in the SRM config so non-deck users don't have to update it.
add Naomi(flycast) support to SRM
