import a few more unicode blocks from Unifont

shell/ is currently broken; we've overflowed available contiguous space
for code.

Block names based on https://www.compart.com/en/unicode/block:
  0x0000 - 0x007f Basic Latin 128
  0x0080 - 0x00ff Latin-1 Supplement 128
  0x0100 - 0x017f Latin Extended-A 128
  0x0180 - 0x024f Latin Extended-B 208
  0x0250 - 0x02af IPA Extensions 96
  0x02b0 - 0x02ff Spacing Modifier Letters 80
  0x0300 - 0x036f Combining Diacritical Marks 112
  0x0370 - 0x03ff Greek and Coptic 135
  0x0400 - 0x04ff Cyrillic 256
  0x0500 - 0x052f Cyrillic Supplement 48
  0x0530 - 0x058f Armenian 91
  0x0590 - 0x05ff Hebrew 88
  0x0600 - 0x06ff Arabic 255
  0x0700 - 0x074f Syriac 77
  0x0750 - 0x077f Arabic Supplement 48
  0x0780 - 0x07bf Thaana 50
  0x07c0 - 0x07ff NKo 62
  0x0800 - 0x083f Samaritan 61
  0x0840 - 0x085f Mandaic 29
  0x0860 - 0x086f Syriac Supplement 11
  0x08a0 - 0x08ff Arabic Extended-A 84
  0x0900 - 0x097f Devanagari 128
  0x0980 - 0x09ff Bengali 96
  0x0a00 - 0x0a7f Gurmukhi 80
  0x0a80 - 0x0aff Gujarati 91
  0x0b00 - 0x0b7f Oriya 91
  0x0b80 - 0x0bff Tamil 72
  0x0c00 - 0x0c7f Telugu 98
  0x0c80 - 0x0cff Kannada 89
  0x0d00 - 0x0d7f Malayalam 118
  0x0d80 - 0x0dff Sinhala 91
  0x0e00 - 0x0e7f Thai 87
  0x0e80 - 0x0eff Lao 82
  0x0f00 - 0x0fff Tibetan 211
  0x1000 - 0x109f Myanmar 160
  0x10a0 - 0x10ff Georgian 88

But don't trust the block sizes above. Thanks to gdb[1] for this helper:

define z
  print 2 * (0x$arg1 - 0x$arg0 + 1)
end

e.g:
  (gdb) z 10a0 10ff
  192

[1] https://sourceware.org/gdb/current/onlinedocs/gdb/Define.html

103grapheme.subx

@@ -77,8 +77,9 @@ draw-grapheme-on-screen-buffer:  # buffer: (addr byte), g: grapheme, x: int, y:
     c1 4/subop/shift-left *(ebp+24) 4/imm8/log2-font-height
     # esi = g
     8b/-> *(ebp+0xc) 6/r32/esi
-    # if (g >= 128) return  # characters beyond ASCII currently not supported
-    81 7/subop/compare %esi 0x80/imm32
+    # if (g >= 4352) return  # unicode planes supported: latin, greek, cyrillic, armenian, hebrew, arabic, syriac, thaana, n'ko, indian (iscii), sinhala, thai, lao, tibetan, myanmar, georgian
+                             # next few to support: CJK, ethiopic, cherokee, ...
+    81 7/subop/compare %esi 0x1100/imm32
     0f 8d/jump-if->= $draw-grapheme-on-screen-buffer:end/disp32
     # var letter-bitmap/esi = font[g]
     69/multiply %esi 0x21/imm32/glyph-size 6/r32/esi