donut/docs/numerical-methods.md, branch main

donut/docs/numerical-methods.md, branch main high-performance blackhole renderer. http://git.hachem.wtf/donut/atom?h=main 2026-08-19T00:02:20Z [feat]: migrate to slang from glsl 2026-08-19T00:02:20Z hachem im@hachem.wtf 2026-08-19T00:02:20Z urn:sha1:f7e05555fb4ff6d8e51bdb5734db4dab1841d593 [doc]: Add explanation and documentation 2025-08-16T22:01:03Z hachem im@hachem.wtf 2025-08-16T22:01:03Z urn:sha1:d4ed53752cb3d078e0b79444a3e9a6015c6ff679