Because pretty much all of TH05's bullet spawn code is micro-optimized
and undecompilable ASM, we'll unfortunately have to keep those ASM
versions around forever 😕
Well, the TH05 ones at least.
Part of P0109, funded by [Anonymous] and Blue Bolt.
Adding op/, main/, and end/ directories does nicely cover a great
majority of the "not really further classifiable slices" implied in
d56bd45.
Part of P0086, funded by [Anonymous] and Blue Bolt.