tiup: add tiup-reference.md (#5322)#5372

ti-chi-bot merged 1 commit into

pingcap:release-5.0pingcap/docs:release-5.0from

ti-srebot:release-5.0-2c1d5588f6e6ti-srebot/docs:release-5.0-2c1d5588f6e6Copy head branch name to clipboard