Inaccurate emulation: mooneye-gb general tests

related to #4

• [x] call_cc_timing2
• [x] call_timing2
• [ ] di_timing-GS.gb (note: this test is expected to pass only when ran on a DMG or SGB, and fail when ran on a CGB or AGB. This is because the name ends in -GS, as explained here)
• [x] ei_sequence
• [x] ei_timing
• [x] halt_ime0_ei
• [x] halt_ime0_nointr_timing
• [x] halt_ime1_timing
• [ ] halt_ime1_timing2-GS (-GS, so the note above also applies)
• [x] if_ie_registers
• [ ] interrupts/ie_push
• [ ] oam_dma/sources-GS (this CRASHES the emulator itself)
• [ ] oam_dma_start
• [x] pop_timing
• [x] rapid_di_ei
• [ ] ../manual-only/sprite_priority.gb (here's how it should look)