TpJna: add tp_imclt_selftest binding. Stage3: run convert_direct + imclt_rbg_all,
report CLT and RBG max error. PASS on 5060 Ti: RBG relative ~1.31e-5 vs golden.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>