[pengzhendong]

Summary

• Add native Kinyarwanda (rw) TN and a new ITN, completing the direction missing from NeMo. Raw-field taggers keep source text; verbalizers perform the conversion. ITN does not import TN language graphs.
• Register both directions in the CLI, packaging, cache-manifest tests and README.
• Apply the shared punctuation joiner. Preserve fixture-required trailing spaces on whole-hour readings, but avoid duplicated joining spaces mid-sentence.

Coverage and limitations

• Original TN rules: cardinal, time and the transliteration whitelist, with word/punctuation fallback.
• New ITN is checked against reversed TN fixtures and hand-written raw-field/mapping tests. Five reverse cases remain excluded with explicit reasons: unrecoverable comma formatting, two non-inverted transliterations and two outer-whitespace variants.
• Ambiguous numeric readings retain n-best alternatives; only acronym whitelist entries that do not conflict with ordinary words are inverted.

Test plan

• All 100 original TN fixture lines retained verbatim
• Language and registration regressions pass with NeMo imports blocked
• Full project suite on the merged master baseline (19707 passed, NeMo imports blocked)
• flake8 tn itn; git diff --check only flags fixture/TSV trailing spaces, which are significant and excluded by pre-commit