shells/xonsh: Update to 0.23.4

• Update from 0.22.8 to 0.23.4
• Fix short and long descriptions (Reported by: Andy Kipp, makc)
• Move prompt-toolkit to RUN_DEPENDS as it is required for the interactive shell
• Combined backport from main

(Cherry picked from commits:
4af2752617fa, cb1add6ce17a, 4e15accd4c4c, 171de8a60868,
20eabb3ff3c3, 8d46b1cef06d, b2bc7a430fb3)