Switch ISO staging/docs from colibri-smoke-agent to colibri-test-agent, include rust/pkgconf for live Colibri rebuilds, stage provider.env.sample, wire the provider env rc.conf path, and document LLM key setup on the Firefox bootstrap page.\n\nChecks: npx --yes prettier@3 --check docs/LIVE-COLIBRI-REBUILD.md live/operator-session/bootstrap.html BUILD.md TESTING.md README.md; sh -n scripts/stage-colibri-iso.sh; sh -n build.sh; fake Colibri staging + sh -n staged rc.d script; git diff --check.
