llama : refactor unicode stuff (#5992)
* llama : refactor unicode stuff
ggml-ci
* unicode : names
* make : fix c++ compiler
* unicode : names
* unicode : straighten tables
* zig : fix build
* unicode : put nfd normalization behind API
ggml-ci
* swift : fix build
* unicode : add BOM
* unicode : add <cstdint>
ggml-ci
* unicode : pass as cpts as const ref
