Re-enable `this-escape` warning, suppress as needed (#2953)
ANTLR now suppresses it properly. We also need to generally suppress it
for now, since we use a lot of weird initialization patterns. Cleaning
these up would be nice in the future. (71b4f1bf by Octavia Togami)
[coremc] Keep a Platform instance in most places
This also makes Adapter an abstract class implemented by the platforms,
which expose their adapter back to coremc and also to other mods. (74dbdf0e by Octavia Togami)
