Formatting pass across simulation, perception, knowledge, NPC, and
test modules. Includes two clippy fixes in monologue.rs (.values()
instead of for (_, v) pattern).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add Albert Ford's symmetric shadowcasting algorithm using rational
fraction slopes. Benchmarked 1.2-10.5x faster than recursive with
guaranteed symmetry (if A sees B, B sees A). Resolves Q-018 as D-035.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>