General fixes for akmenu

[chyyran]

What's changed?

• Fixes folder paths not being properly saved on akmenu (paths on akmenu need trailing slash, but saves without trailing slash)
• Moves AP check, compat check, cheat handling into bootstrapconfig
• Big refactor for bootstrapconfig to make it theme generic (in preparation for use in other themes)
• Refactored widescreen configuration into widescreenconfig (in preparation for use in other themes)
• Added sort order support to akmenu
• Added update recently played to akmenu
• Made DSi theme highlight restore based on ROM_PATH filename instead of cursor position.
• Removes File IO options in akmenu, use GodMode9i for that.
• Reverts AKmenu disable commits

Where have you tested it?

• Nintendo DSi
• Nintendo DS Lite on AK2i for B4DS

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Pull Request status

• [x] This PR has been tested using the provided devkitPro, devkitARM, and EasyGL2D.

[chyyran]

blocking on #1208

[NightScript370]

The acekard theme has been updated since the last commit of this PR. Please update your fork accordingly

[chyyran]

APfix/MPU changes?

[NightScript370]

That + MPU Map

[chyyran]

i'll probably end up making the menu changes to fix this on libfat, ill rebase this branch when i get the chance to work on this again.