goctl model reactor (#15)

* reactor sql generation

* reactor sql generation

* add console & example

* optimize unit test & add document

* modify default config

* remove test file

* Revert "remove test file"

This reverts commit 81041f9e

* fix stringx.go & optimize example

* remove unused code

tools/goctl/model/sql/example/generator.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# generate usermodel with cache
+goctl model -src ./sql/user.sql -dir ./model -c true