Upload test/test_invariants.py with huggingface_hub

Merge duplicate tests: consolidate primary+alt pairs into single tests

Add 6 new invariant tests: Latin-only en, no empty lists, hierarchy parent/children

Add 19 new invariant tests; fix BE-WAL, TJ-RA, JP-01, AD-07, MK-205, BY-HM, JO-JA, UA-30

[test] add zh/ru script-purity invariants incl alts

[iso_3166-2] remove hash invariant tests

Update test to load from HF Hub

Add invariant tests