Update to use Emoji CLDR data

[gingerbeardman]

Generator should use https://unicode.org/Public/emoji/12.0/
https://unicode.org/Public/emoji/12.0/emoji-test.txt rather than copy/pasted HTML table.

Previously the HTML table approach worked, but with Emoji V12.0 (and possibly before) the HTML table no longer includes variations (such as skin tone).

[gingerbeardman]

Actually, it seems better to use CLDR data from https://github.com/unicode-org/cldr/tree/release-35

Benefits

• support for different languages (localisable)

Details

• /common/annotations/en.xml

<annotation cp="🔰">beginner | chevron | Japanese | Japanese symbol for beginner | leaf</annotation>
<annotation cp="🔰" type="tts">Japanese symbol for beginner</annotation>

• /common/annotationsDerived/en.xml

<annotation cp="🏴󠁧󠁢󠁥󠁮󠁧󠁿">flag</annotation>
<annotation cp="🏴󠁧󠁢󠁥󠁮󠁧󠁿" type="tts">flag: England</annotation>