Prototype scaffolding for ir2dslx for lifting IR back to DSLX.#533

cdleary wants to merge 2 commits intomainxlsynth/xlsynth-crate:mainfrom

cdleary/2025-08-25-start-ir-to-dslxxlsynth/xlsynth-crate:cdleary/2025-08-25-start-ir-to-dslxCopy head branch name to clipboard