(U+56D8): Apply new conventions for glyph granularity.

(U+56D8): Apply new conventions for glyph granularity.
(GT-K01419): New character.
(U+56DE): Add `sound@ja/on/{kan|go}', `sound@ja/on/tou' and
`sound@ja/on/conventional'; add some relations for other characters.
(U+56DF): Add `sound@ja/on'; unify MJ008821 and KOSEKI-053610; add
some relations for other characters.
(U+56E7): Apply new conventions for glyph granularity.
(U+56EC): Add `sound@ja/on'; add `<-ancient' for U+9762; add
`->mistakable' for U+56DE.
(U+56FA): Apply new conventions for glyph granularity.
(U-000211DF): Likewise.
(U+5705): Likewise.
(U+5709): Likewise.
(U+571A): Likewise.