feat: add feature based structure

internal/author/controller.go

@@ -0,0 +1,26 @@
+package user
+
+import (
+	"context"
+
+	"github.com/gin-gonic/gin"
+	"tutorial.sqlc.dev/app/internal/author/gen"
+)
+
+type Controller struct {
+	queries gen.Queries
+}
+
+func NewController(conn gen.DBTX) Controller {
+	return Controller{
+		queries: *gen.New(conn),
+	}
+}
+
+func (u *Controller) ListAuthors(ctx *gin.Context) {
+	authors, err := u.queries.ListAuthors(context.Background())
+	if err != nil {
+		ctx.AbortWithError(500, err)
+	}
+	ctx.JSON(200, authors)
+}