refactor: rename SiteConfig to Site for consistency in configuration structure

Author: 1chooo

config/config.go

@@ -1,19 +1,19 @@
 package config
 
 type Config struct {
-	CN             SiteConfig
-	EN             SiteConfig
+	CN             Site
+	EN             Site
 	Level          LevelMap
 	Language       []Language
 	Naming         NamingMap
 	QuestionDataQL func(titleSlug string) GraphQLRequest
 }
 
 var DefaultConfig = Config{
-	CN: SiteConfig{
+	CN: Site{
 		Domain: "https://leetcode-cn.com",
 	},
-	EN: SiteConfig{
+	EN: Site{
 		Domain: "https://leetcode.com",
 	},
 	Level: LevelMap{

config/type.go

@@ -1,6 +1,6 @@
 package config
 
-type SiteConfig struct {
+type Site struct {
 	Domain string
 }