WIP: Full restruct, seprate service and api

Signed-off-by: Asai Neko <sugar@sne.moe>

service/common.go

@@ -0,0 +1,8 @@
+package service
+
+import "nixcn-cms/internal/exception"
+
+type CommonResult struct {
+	HttpCode  int
+	Exception *exception.Builder
+}