Improve pull request flow, add branch selection for worktree creation, fix auto-mode concurrency count#784

gsxdsm wants to merge 5 commits intoAutoMaker-Org:v0.15.0rcAutoMaker-Org/automaker:v0.15.0rcfrom

gsxdsm:fix/fetch-before-pull-fetchgsxdsm/automaker:fix/fetch-before-pull-fetchCopy head branch name to clipboard