Consider packing languageCodeList tighter

There seem to be quite some opportunities to pack some of the arrays that contain locale data more tightly.

1. The AlphaCode struct is a char[4] for, but only ever holds [a-z]{,3}, which fits into 16 bits, halving the size of an AlphaCode struct. The languageCodeList is currently >5KiB in size, so we'd save 2.5KiB on this alone.
   • There is also quite some repetition of 3LCs in that area, but with the above change, any index would have to be 16-bit, too, so would actually increase the size again
   • alternatively, to keep the easy conversion to QL1SV, can pack them into char[3]'s, reducing one languageCodeList entry from 16B to 12B.
2. TerritoryLanguage is currently 8B in size, but the languageId and territoryId both fit into 9-bit fields, leaving ample space in a 32-bit bitfield for the `system`.
3. to be continued...