Maniac: Support of custom chunks

[Ghabry]

The Maniac patch adds certain chunks. Some of them are useful in general, e.g. for debugging purposes.

see also #1818

Here is the list:

Enemy:

• maniac_unarmed_animation. Animation for normal enemy attacks. This is a cool addition for the battle system imo 👍 (also doesnt sound hard to implement. CC @rueter37 Implement customizable enemy unarmed battle animation #2498 since 0.7

ExecFrame:

• maniac_event_info. Information about the current event. Useful for debugging.
• maniac_event_id. The event ID (contrary to the other event ID field this one is not reset on map change, Useful for debugging)
• maniac_event_page_id. The current event page. Useful for debugging
• maniac_loop_info_size. Here we must only write the correct value (it is possible to let liblcf do this would have required a custom type, which was not worth it for a patch imo) Maniac: Implement Loop and Break Loop enhancements #2649
• maniac_loop_info: Needed for the loop event command Maniac: Implement Loop and Break Loop enhancements #2649

System:

• maniac_frameskip - Imo this one is not interesting. WONT FIX.
• maniac_picture_limit - Not really useful, we could just copy our Picture limit over (but we are dynamic so this doesn't really matter)
• maniac_options: Imo this stuff should be global options, not game options. Except for TestPlay toggle feature.
• maniac_joypad_bindings: Maybe interesting?