Overhaul the warning system

[grunt-lucas]

• the entire warning parsing system is a hot flaming dumpster fire mess, fix it somehow?
  • https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
• warnings-as-errors shouldn't bail until the very end, is there an easy way to do this?
• clang/gcc will show "And 100 similar warnings..." if there are too many warnings, something like this