[Feature Request] Handle negative Add Address offsets using Remember/Recall (or simply source modification for appropriate platforms), if available

[Souzooka]

Problem:
When/if raintegration supports 64-bit values in achievement logic, achievements using negative offsets (which rely on integer overflow) will cease to work. This is because if someone uses a 0xFFFFFFC0 offset on a pointer to 0x1000, the resulting address becomes 0x9C0 with a 32-bit accumulator, but 0x1000009C0 with a 64-bit accumulator.

Solution:
While in 99.99% of scenarios a developer using a negative offset is using an incorrect pointer for their data, the 64-bit issue can still be mitigated for those doing so with RATools.

While currently RATools will output code such as:

Add Address mem 32-bit 0xCAFE     & value 0x1FFFFFF
            mem 32-bit 0xFFFFFFC0 = value 0xBAD

as an alternative when RATools sees that an offset >= 0x80000000 is being used, it can construct logic such as:

Remember    mem    32-bit 0xCAFE     & value 0x1FFFFFF
Add Address recall                   - value 0x40
            mem    32-bit 0x0        = value 0xBAD

For platforms which require no transformation of the pointer (via source modification) to comply with RA's custom virtual maps, simple source modification can be used:

Add Address mem    32-bit 0xCAFE     - value 0x40
            mem    32-bit 0x0        = value 0xBAD

While, to reiterate, developers should not be using negative offsets, this should reduce the technical debt created when this occurs.