(U+738A): Add `sound@ja/on/{kan|go}'; add some relations for other

(U+738A): Add `sound@ja/on/{kan|go}'; add some relations for other
characters.
(U-000248FD): New character.
(U-00024904): Add `ideographic-structure'; add representative nodes.
(U+73DB): Apply new conventions for glyph granularity.
(U-00024954): Unify M-20955; add `ideographic-structure'; add
`sound@ja/on/{kan|go}'; add some relations for other characters; add
representative nodes.
(A-IWDSU+2493A): New abstract node.
(U-0002493A): Unify M-20966; add `<-denotational' for A-IWDSU+2493A;
add `ideographic-structure'; add `sound@ja/on'; add `<-formed' and
`<-same' for U+73B4; add representative nodes.
(U-0002495F): New character; use `<-denotational' for A-IWDSU+2493A.
(U-000249DA): New character.
(U+749B): Add `ideographic-structure'; add `sound@ja/on/{kan|go}'; add
some relations for other characters; add representative nodes.
(U-00024A64): Add `ideographic-structure'; add `sound@ja/on'.
(IU+24A64): Add `ideographic-structure'; unify MJ041079 and
KOSEKI-238370; add `<-same' for IU+24A8E.
(U-00024A5A): New character.