gplay appstore (alternative app store operations)

gplay appstore acts for the operator of a third-party Android app store: the catalog that store mirrors from Play, and the apps it hosts and must send to Google for review. Publishing your own app to Google Play is gplay-release-flow.

Shared conventions (auth, output, exit codes, --dry-run/--confirm, the [experimental] contract) are in gplay-cli-usage. Read the current flags from gplay appstore <command> --help: it is long and complete, and this skill carries the order the commands go in and the traps between them.

Caller and subject: two packages, one command