Add Haskell skill

[srid]

• general parts of https://github.com/srid/nixos-config/blob/83689da0a21c1116617cfd4d5e7823719f8f9fe9/AI/skills/haskell/SKILL.md
• https://github.com/jamesward/skills/blob/main/skills/zen-of-james/SKILL.md (via: https://x.com/JamesWard/status/2033693072530485587)