Find a way to efficiently scale wasm memory

[torch2424]

As suggested by ISSOtm:

Possible allocation strategy :

• Allocate one page
• Dump ROM0 and ROM1, which always exist, in the first 32kB
• Check cart header
• Grow() accordingly, and dump ROM
• Grow() by one page for the rest of the memory (2 pages if it turns out more is needed, though) (Btw, 1 page spans 4 ROM banks)

After referencing the Wasmboy memory map

[torch2424]

Currently, the Memory is estimated to be about 9MB, which isn't much of a problem, because apparently the cap on wasm memory is 2 gigabytes

[torch2424]

Honestly, if we throw the cartridge at the end of the memory map, then we can scale suuuuppeerrr easy. May want to do that, since the memory map already differs quite a but anyways, and won't require any more work from out memory mapps to find where everything else (Gameboy internals and Sprite map) should be based on the current bank

[torch2424]

Updated Memory map accordingly in Wasmboy Memory Map Google Doc

[torch2424]

See #50 for possible implmeentations