data(kana): one sokuon rule for every doubled consonant, and the missing hira rows

Hiragana spelled out 42 doubled syllables (kka, ssha, ttsu, ...) and so
knew none it did not list: matcha, baggu and beddo came out as ma-tc-ha,
ba-gg-u. Katakana already used the engine's small-tsu rule for a few
doubles. Both maps now list every doubled consonant but n, plus tch, and
hiragana gains di, che and fa/fi/fe/fo like katakana.

map/kata.map

@@ -128,6 +128,17 @@ pp	ッ
 tt	ッ
 tch	ッ
 ss	ッ
+gg	ッ
+zz	ッ
+jj	ッ
+bb	ッ
+hh	ッ
+ff	ッ
+mm	ッ
+yy	ッ
+rr	ッ
+ww	ッ
+vv	ッ
 di	ディ
 fa	ファ
 fi	フィ