(A-compU+5DDB): Separate IWDS1-0270; add `<-denotational@component'

(A-compU+5DDB): Separate IWDS1-0270; add `<-denotational@component'
for IWDS1-0270.
(U+5DDB): Add `ideographic-structure'; add `sound@ja/on'; add some
relations for other characters.
(U-00021FE6): Add `<-denotational@component' for A-compU+5DDB; add
`ideographic-structure'.
(U-00021FE8): Add `<-denotational@component' for A-compU+21FE8; apply
new conventions for glyph granularity.
(BC-8DEA-itaiji-001): New character; use `<-denotational' for
U-00021FE8.
(BC-85BF): Ditto.
(U+5DDC): Apply new conventions for glyph granularity.
(U+244EF-itaiji-001): New character.
(GT-K00633): Add `<-formed@component' for U+244EF-itaiji-001.
(U-0002D5FA): Apply new conventions for glyph granularity.
(U-00021FED): Likewise.
(U-0002D5FB): Modify structure.
(U+5DE0): Apply new conventions for glyph granularity.
(IWDS1-0270): Unify A-IWDSU+5DDB instead of A-compU+5DDB.