mypy

2955e3c3 - [mypyc] Add big endian read/write functions to librt.strings (#20772)

[mypyc] Add big endian read/write functions to librt.strings (#20772) This is pretty straightforward -- add big endian variants of existing functions. Follow-up to #20757. I'll add float read/write functions in a follow-up PR. Also restructure primitive definitions to have more consistent order. I used coding agent assist to generate the repetitive parts and to refactor the code and tests.