(BC-8853): New character; unify GT-K02610.

(BC-8853): New character; unify GT-K02610.
(IWDS1-0288): New abstract node; unify A-IWDSU+867D.
(U+867D): Add `<-denotational' for IWDS1-0288.
(U-00027227): Likewise.
(U-0002723F): Add representative nodes.
(A-IWDSU+86C6): New abstract node.
(U+45A7): Add `<-denotational@component' for A-IWDSU+86C6.
(U+86C2): Apply new conventions for glyph granularity.
(U+86C6): Add `<-denotational@component' for A-IWDSU+86C6.
(U+86A9): Apply new conventions for glyph granularity.
(U+86E7): Use `->denotational' and `->subsumptive'.
(U+45C2): Apply new conventions for glyph granularity.
(U+8733): Likewise.
(U-00027351): Likewise.
(U+8744): Add `ideographic-structure'; add `sound@ja/on'; add
representative nodes.
(HD-KS378190): New character; use `<-denotational' for U+8744; unify
MH-0543; add `<-vulgar' for JU+86E7.
(U+8767): Apply new conventions for glyph granularity.
(U-000273DC): Likewise.
(U+8792): Likewise.
(U+8796): Likewise.
(U+879B): Likewise.
(U+45DD): Likewise.
(U+87A3): Likewise.
(U-000273C2): Use `->subsumptive'.
(U-000273C3): Apply new conventions for glyph granularity.
(U-000273DD): Likewise.
(U+45DF): Likewise.
(U-00027405): Likewise.
(U-00027406): Likewise.
(U+45EB): Likewise.
(U-00027457): Use `->subsumptive'.
(U+8802): Apply new conventions for glyph granularity.
(U+45FA): Likewise.
(U+8810): Add `ideographic-structure'.
(U+45FF): Apply new conventions for glyph granularity.
(U+8817): Likewise.
(U-000274D4): Likewise.
(U-000274F8): Likewise.
(U-00027516): Likewise.
(U+8825): Likewise.
(U-0002752B): Likewise.
(A-cgnU+2755D): New abstract node.
(U-0002755D): Use `->subsumptive'; add `<-denotational' for
A-cgnU+2755D.
(U+8838): Apply new conventions for glyph granularity.
(U-00027560): Likewise.
(U-00020474): Likewise.