feat(auth): add first-run setup wizard#129

ndycode wants to merge 5 commits intoclean/pr102-opencode-import-replay-finalndycode/codex-multi-auth:clean/pr102-opencode-import-replay-finalfrom

clean/pr103-first-run-wizardndycode/codex-multi-auth:clean/pr103-first-run-wizardCopy head branch name to clipboard