Maniac Event command (regression) fixes

[Ghabry]

Mostly about Maniac Patch and this one regression found in Yume2kki.

[Ghabry]

This currently doesn't fix the GetSaveInfo Async bug due to lack of reproducability on my side.

The rest of the commit is the copilot pull request summary. Wanted to try this feature once. Gotta use some of Microsofts Nuclear power plants.

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This pull request includes various improvements and refactorings across multiple files, mainly focusing on enhancing the caching mechanism, improving global save handling, and refining the loading of save games. The most important changes include modifying the caching key structure, improving global save operations, and enhancing the save game loading process.

Improvements to Caching Mechanism:

• src/cache.cpp: Modified the effect_key_type to include bool for transparency and added an assertion to ensure the bitmap ID is not empty. ([[1]](https://github.com/EasyRPG/Player/pull/3281/files#diff-be9318866236764f4db7ab43183eacf7ab841a7ca4e77e7adf2ac6bb0f8663c4L85-R85), [[2]](https://github.com/EasyRPG/Player/pull/3281/files#diff-be9318866236764f4db7ab43183eacf7ab841a7ca4e77e7adf2ac6bb0f8663c4R468-R477))

Enhancements to Global Save Handling:

• src/game_interpreter.cpp: Refactored the global save handling logic by introducing a lambda function for loading the global save and ensuring the global save is opened or closed correctly. ([[1]](https://github.com/EasyRPG/Player/pull/3281/files#diff-6201ae4886638abb44984fb7d69b851b9596edd6cd6615c7a7738060150acab8L4524-R4535), [[2]](https://github.com/EasyRPG/Player/pull/3281/files#diff-6201ae4886638abb44984fb7d69b851b9596edd6cd6615c7a7738060150acab8R4596-R4606))
• src/main_data.cpp, src/main_data.h: Added a global_save_opened flag to track the state of the global save and reset it during cleanup. ([[1]](https://github.com/EasyRPG/Player/pull/3281/files#diff-e00dbe084ef4385c214d8438138633c7201fda3da38f2380d5e8803b77a0f761R74), [[2]](https://github.com/EasyRPG/Player/pull/3281/files#diff-e00dbe084ef4385c214d8438138633c7201fda3da38f2380d5e8803b77a0f761R129-R131), [[3]](https://github.com/EasyRPG/Player/pull/3281/files#diff-24aa28575530ff8ade3582ea243065f3ebf83a5073abfbbe6ceecf37c590a0faR61))

Refinements to Save Game Loading:

• src/player.cpp: Improved the save game loading process by handling load_on_map within the async callback and ensuring the game map is disposed of correctly before loading the new save. ([[1]](https://github.com/EasyRPG/Player/pull/3281/files#diff-10c39dd978ada90e0d090a045c4ae5f51dad010f3b754679e15894c9b93d254bL1164), [[2]](https://github.com/EasyRPG/Player/pull/3281/files#diff-10c39dd978ada90e0d090a045c4ae5f51dad010f3b754679e15894c9b93d254bL1183-L1194))

Miscellaneous Improvements:

• src/game_interpreter.cpp: Included the async_handler.h header to support asynchronous operations. ([src/game_interpreter.cppR28](https://github.com/EasyRPG/Player/pull/3281/files#diff-6201ae4886638abb44984fb7d69b851b9596edd6cd6615c7a7738060150acab8R28))
• src/game_interpreter.cpp: Simplified the logic for handling picture parameters and ensured default transparency settings. ([src/game_interpreter.cppL4060-R4069](https://github.com/EasyRPG/Player/pull/3281/files#diff-6201ae4886638abb44984fb7d69b851b9596edd6cd6615c7a7738060150acab8L4060-R4069))

[Ghabry]

decided to add the "Improved ZIP encoding detection" commit because it is only one line xD

[Ghabry]

Tested the commands sqrt etc. as suggested in the chat: The results match for me between EasyRPG and Maniacs. No need to swap them.