TODO

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| Boi: a humble GameBoy emulator implemented in C |
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Init:
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    [x] initialize CPU

    [x] load ROM

    [x] initialize memory

    [ ] initialize graphics

CPU:
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    [x] implement all structs

    [x] main CPU cycle loop

    [ ] interrupt handler

    [-] implement opcodes

    [ ] handle clock

ESP32:
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    [ ] implement screen driver

    [ ] implement button driver

    [ ] integrate it into emulator

Tests:
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    [ ] do error handling well

    [ ] write unit tests

    [ ] write integration tests

    [ ] pass Blargg's tests

GPU:
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    [ ] initialize GPU memory

    [ ] implement GPU cycle

Misc:
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    [ ] implement a CPU state dump

    [x] game Loop

    [ ] grep for TODO everywhere