(U+5730): Add `<-denotational@usage' for BUCS+5730; apply new

(U+5730): Add `<-denotational@usage' for BUCS+5730; apply new
conventions for glyph granularity.
(U+57CA): Apply new conventions for glyph granularity.
(U+57F6): Add `<-denotational@usage' for A2-DJT-01754; apply new
conventions for glyph granularity.
(IU+21390): Use UU+5774 instead of U+5774 as a glyph-granularity
component.
(UU+5862): Use UU+70CF instead of U+70CF as a glyph-granularity
component.
(U+2F857): Use U+20B1D-itaiji-001 instead of U+378B as a component;
add `sound@ja/on'; apply new conventions for glyph granularity.
(U+58AC): Add ideographic-structure; add `<-Zhouwen' for U+5730.
(U-000214B0): Use `->denotational' and `->subsumptive'.
(U-000214EC): Add `<-Zhouwen' for U+5730.
(BUCS+5730): New abstract node; unify A2-DJT-01666.
(A2-DJT-01754): New abstract node.