feat: 新增 v3 付款码服务商模式

[majiameng]

经过您的指导，我安装了v3.6版本来使用微信服务商v2付款码，偶然间翻微信文档找到了微信服务商v3付款码支付。

普通商户付款码支付V3接口文档地址： 付款码支付： https://pay.weixin.qq.com/docs/merchant/apis/code-payment-v3/direct/code-pay.html 撤销订单： https://pay.weixin.qq.com/docs/merchant/apis/code-payment-v3/direct/reverse.html

服务商模式付款码支付V3接口文档地址： 服务商付款码支付： https://pay.weixin.qq.com/docs/partner/apis/partner-code-payment-v3/partner/partner-code-pay.html 服务商付款码支付撤销订单： https://pay.weixin.qq.com/docs/partner/apis/partner-code-payment-v3/partner/partner-reverse.html

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.49%. Comparing base (da3bf50) to head (c82e71b).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1010 +/- ## ========================================= Coverage 97.49% 97.49% - Complexity 952 957 +5 ========================================= Files 361 361 Lines 6456 6479 +23 ========================================= + Hits 6294 6317 +23 Misses 162 162 ```

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