(M-00289): Separate C3-2147 and U+4EA3; add `ideographic-structure'.

(M-00289): Separate C3-2147 and U+4EA3; add `ideographic-structure'.
(BC-8C5E): Unify C3J-8DCD.
(U+4EA7): Add `ideographic-structure'.
(U+4EAA): Likewise.
(J0-5037): Separate C3-2B25 and U+4EB0; use `<-vulgar-ideograph'
instead of `vulgar-char-of-shinjigen-1'; add `ideographic-structure'.
(M-00309): Separate C3-2B27 and U+4EB1; add `ideographic-structure'.
(C3J-81D2): Use U+6729 instead of U+6728 in `ideographic-structure'.
(C3-2B24): Add `ideographic-structure'.
(U+4EB2): Likewise.
(U+4EB4): Likewise.
(U+4EB5): Likewise.
(U+4EB7): Likewise.
(U+4EB8): Likewise.