Implement an offset cache for offsets determined by byte patterns

[monkeyman192]

Once we have the ability to specify the byte patterns for a particular function, we want to be able to make this more efficient by only searching for these patterns once for a given binary (unique up to the hash of the binary).
Once the pattern has been found we want to cache the relative offset within the binary in a separate file which can be used as a lookup for the offset instead of doing the expensive byte pattern scanning on every load or reload