feat: add new theme air (#1167)

* chore: add theme air with new-api main branch v0.2.0.3-alpha.1(first step)

* feat: 完成渠道界面

* chore: 优化渠道界面样式问题

* feat: 完成兑换码界面

* feat: 完成充值（钱包）界面

* chore: 初代air主题将使用default主题的运营设置界面、系统设置界面、其他设置界面

* feat: 完成日志界面

* feat: 完成用户管理界面

* feat: 完成个人设置界面

* feat: 完成令牌界面

* chore: 优化令牌界面逻辑

* feat: 修改版权信息

* chore: make necessary changes

---------

Co-authored-by: Calon <1808837298@qq.com>
Co-authored-by: Apple\Apple <zeraturing@foxmail.com>
Co-authored-by: JustSong <songquanpeng@foxmail.com>

common/config/config.go

@@ -107,6 +107,7 @@ var Theme = env.String("THEME", "default")
 var ValidThemes = map[string]bool{
 	"default": true,
 	"berry":   true,
+	"air":     true,
 }
 
 // All duration's unit is seconds