feat(cli): add game export command

feat(cli): add game project template

feat(cli): add Vue template and full-stack dev workflow

feat(cli): support vix.app scaffold and checks

refactor(cli): move repl engine to reply module

feat(build): add warning check and paginated warning output

feat(cli): make build run dev and tests workflows generic

feat(build): improve explain safety and graph fallback

feat(build): make graph target executor default

fix(run): use user project directory for project watch