feat: update gen_model to support provider

pkg/ast/model/table.go.tpl

@@ -1,14 +1,9 @@
-package models
+package model
 
 import (
-	"github.com/sirupsen/logrus"
+	log "github.com/sirupsen/logrus"
 )
-// @provider
-type {{.CamelTable}}Model struct {
-	log *logrus.Entry `inject:"false"`
-}
 
-func (m *{{.CamelTable}}Model) Prepare() error {
-	m.log = logrus.WithField("model", "{{.CamelTable}}Model")
-	return nil
+func (m *{{.PascalTable}}) log() *log.Entry {
+	return log.WithField("model", "{{.PascalTable}}Model")
 }