feat: global -y/--yes flag to skip additive confirmations

repo create's y/N push confirmation can now be skipped with -y. The flag
is global (top-level parser), so it goes before the subcommand:
gitctl -y repo create ... . The diff is still printed and an
auto-confirmed note shown. -y does NOT bypass SSH key auth (the phase-1
push still needs the password / smartcard touch), so creation is never
fully unattended.

Hard wall: -y is never honored by a future destructive delete; the flag
help, a client comment, and TODO item 1 all record this. Bash completion
offers -y at the top level and transparently skips a leading -y when
resolving the subcommand. Self-test pins the parse round-trip.

Client-only change; the server helper is unchanged, no redeploy needed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

0 files changed, 0 insertions, 0 deletions