Use U+5FC4 instead of <CJK RADICAL HEART ONE> in

`ideographic-structure' of abstract characters and abstract glyphs.
(A-M-10307): New abstract node.
(U-000225AD): Use `<-denotational' for A-M-10307; add representative
nodes.
(U+225AD-itaiji-001): New character; use `<-denotational' for
A-M-10307.
(U-00022608): Use U+225AD-itaiji-001 instead of "⿰⺖卩" in
`ideographic-structure'; add `<-ancient' for UU+6028; apply new
conventions for glyph granularity.
(U-00022614): Use U-000225AD instead of "⿰⺖㔾" in
`ideographic-structure'; add `<-ancient' and `<-same' for UU+6028;
apply new conventions for glyph granularity.