chore: regenerate codes_gen.go with CompiledTable slice literals

Replace map-based VersionTable literals in codes_gen.go with
CompiledTable sorted slice literals. This eliminates runtime hash
table construction (9.48MB of map.init code → 6.13MB of slice init).

Also update the spec2go generator to emit CompiledTable syntax and
remove the compile_raw_tables.go bridge that was converting maps to
sorted slices at runtime.

Author: xaionaro@dx.center