The PGSQL subcommand implementation

Add new subcommand pig pgsql, which wrap PGSQL playbooks:

pig pgsql
pig pgsql install
pig pgsql cls add
pig pgsql cls del
pig pgsql cls info
pig pgsql cls list

pig pgsql ins add
pig pgsql ins del
pig pgsql ins info
pig pgsql ins list

pig pgsql user add
pig pgsql user del
pig pgsql user info
pig pgsql user list

pig pgsql db
pig pgsql db put [cls]
pig pgsql db del
pig pgsql db info
pig pgsql db list

pig pgsql svc put
pig pgsql svc del
pig pgsql svc info
pig pgsql svc list

pig pgsql hba
pig pgsql hba info
pig pgsql hba list

pig pgsql ext add
pig pgsql ext rm
pig pgsql ext info
pig pgsql ext list

pig pgsql ha   .....
pig pgsql pitr .....
pig pgsql pause
pig pgsql config
pig pgsql failover
pig pgsql list|pause|query|reinit|reload|remove|restart|resume



pig pgsql postgres|pg     status|start|stop|reload|restart|promote
pig pgsql patroni|pt      status|start|stop|reload|restart
pig pgsql pgbouncer|pgb   status|start|stop|reload|restart
pig pgsql pg_exporter|pge ...
pig pgsql pgbouncer_exporter|pgbe ...
pig pgsql pgbackrest_exporter|pbe ...

Similar stuff:

pig etcd cls add|rm|list|info
pig etcd ins add|rm|list|info
pig etcd env
pig etcd install

pig minio install
pig minio cls add|rm|list|info
pig minio ins add|rm|list|info

pig redis install
pig redis cls add|rm|list|info
pig redis ins add|rm|list|info

pig infra install
pig infra cert
pig infra repo upstream|build|add|pkg|boot|create|clean