Move user related model into models/user (#17781)

* Move user related model into models/user

* Fix lint for windows

* Fix windows lint

* Fix windows lint

* Move some tests in models

* Merge

integrations/api_org_test.go

@@ -10,8 +10,8 @@ import (
 	"strings"
 	"testing"
 
-	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 
@@ -44,7 +44,7 @@ func TestAPIOrgCreate(t *testing.T) {
 		assert.Equal(t, org.Location, apiOrg.Location)
 		assert.Equal(t, org.Visibility, apiOrg.Visibility)
 
-		unittest.AssertExistsAndLoadBean(t, &models.User{
+		unittest.AssertExistsAndLoadBean(t, &user_model.User{
 			Name:      org.UserName,
 			LowerName: strings.ToLower(org.UserName),
 			FullName:  org.FullName,