Speed-up `topk` with new `adix/topk`; Make compile with gcc-14

Uses a new adix/topk to make bu/topn ϴ(lg k) faster and with output order options & a config file.

Make catz.nim and dirq.nim compile with gcc-14.

In particular, the dirq.nim exposes a Nim codegen problem where it is unclear how smooth a path forward exists Nim deprecation/back-compat-wise. For now just add a -Wno-error directive which works under gcc & clang.