nx_retire_gcc_orchestrator.nx

nx_retire_gcc_orchestrator.nx -- the TEAM drives the gcc-retirement, using the sovereign tools, and FLAGS the result to the PM review log (operator: "build the team and have them use the tools and flag if we need additional tooling or capabilities or logic"). All orchestration is NishiLang fork/exec (no .sh). It replaces gcc-as+ld on the build path with the team's own nxasm_x86 assembler+linker: PHASE 0 (one-time bootstrap of the TOOL): nx_cc nxasm_x86_main.nx -> .s ; gcc -> /tmp/nxasm_x86 (gcc allowed ONCE to bootstrap the assembler tool itself = the Wheeler bootstrap). PHASE 1 (SOVEREIGN build, NO gcc): nx_cc target.nx -> .s ; nxasm_x86 .s -> .elf ; run the .elf. PHASE 2: flag DELIVERABLE (gcc retired on this path) or a precise GAP (which step + what's needed) to /tmp/nishi_pm_review.log for our joint review. license_tier: ORIGINAL Reuses the _run spine from nx_build_orchestrator.