feat: move db gen out, emit json field

cmd/api/main.go

@@ -8,6 +8,7 @@ import (
 	"github.com/jackc/pgx/v5"
 
 	"tutorial.sqlc.dev/app/internal/author"
+	"tutorial.sqlc.dev/app/internal/db"
 )
 
 func run() error {
@@ -19,8 +20,9 @@ func run() error {
 	}
 	defer conn.Close(ctx)
 
+	querier := db.New(conn)
 	r := gin.Default()
-	authorCtl := author.NewController(conn)
+	authorCtl := author.NewController(querier)
 	author.Register(r, &authorCtl)
 
 	r.Run(":8000")