docs: relocate KRL architecture map out of tangle (Tangle/KRL disambiguation)

docs/krl_map.html is KRL-specific content that belongs in the krl repo (whose
README links to it). Tangle is the knot-theoretic programming language; KRL is
one downstream dialect/application with its own repo. Moved to
krl/docs/krl_map.html.

https://claude.ai/code/session_017TXizM5c1Yd9HWf7Y15YH2

Author: claude