Add pico-8 emulator support

[finger563]

Add PICO-8 emulator support to expand the available game library.

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:zap: Static analysis result :zap:

:red_circle: cppcheck found 1 issue! Click here to see details.

https://github.com/esp-cpp/esp-box-emu/blob/6f2b4b60770fee093e804cb93d45c8ddf56d9ace/components/pico8/src/pico8.cpp#L246-L251

!Line: 246 - warning: Either the condition '!buffer' is redundant or there is possible null pointer dereference: buffer. [nullPointerRedundantCheck]

!Line: 244 - note: Assuming that condition '!buffer' is not redundant
!Line: 246 - note: Null pointer dereference

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