Move SQL engine and PostgreSQL server to their own binaries (#8417)

* Drop SQL engine and PostgreSQL server

* Split SQL tooling into weed-db and weed-sql

* move

* fix building

weed/command/command.go

@@ -37,12 +37,10 @@ var Commands = []*Command{
 	cmdMqAgent,
 	cmdMqBroker,
 	cmdMqKafkaGateway,
-	cmdDB,
 	cmdS3,
 	cmdScaffold,
 	cmdServer,
 	cmdShell,
-	cmdSql,
 	cmdUpdate,
 	cmdUpload,
 	cmdVersion,