unicode-query: Show emoji presentation in Unicode properties query tool

[christianparpart]

I used it to figure out the default emoji presentation style for U+260D.
Seems like the sites I tested do not show this information, but I know we have it in our codepoint properties database.
I think it's worth adding it to unicode-query for future aids, as well.

Example output:

christianparpart@fedora ~/p/libunicode> unicode-query U+270D
Name                        : WRITING HAND
Unicode Version             : 1.1
Codepoint                   : U+270d
UTF-8                       : "\xe2\x9c\x8d"
Display                     : ✍
Plane                       : Basic_Multilingual_Plane
Block                       : Dingbats
Script                      : Common
General Category            : Other_Symbol
East Asian Width            : Neutral
Character width             : 1
Emoji Segmentation Category : EmojiModifierBase
Emoji Presentation          : text
Grapheme Cluster Break      : Other

[Yaraslaut]

LGTM