feat: 增加抖音支付

[yansongda]

close: #596

[netlify]

✅ Deploy Preview for pay-yansongda canceled.

Name	Link
🔨 Latest commit	cfdd8d1
🔍 Latest deploy log	https://app.netlify.com/sites/pay-yansongda/deploys/66af9a935d589f000865cbdd

[cloudflare-workers-and-pages]

Deploying pay with    Cloudflare Pages

Latest commit:	5a40b31
Status:	✅  Deploy successful!
Preview URL:	https://b70a869f.pay-1bj.pages.dev
Branch Preview URL:	https://feat-douyin.pay-1bj.pages.dev

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[codecov]

Codecov Report

Attention: Patch coverage is 96.02446% with 13 lines in your changes missing coverage. Please review.

Project coverage is 97.41%. Comparing base (e73c8bf) to head (5a40b31).

Files	Patch %	Lines
...Plugin/Douyin/V1/Pay/AddPayloadSignaturePlugin.php	65.62%	11 Missing ⚠️
src/Provider/Douyin.php	94.73%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1014      +/-   ##
============================================
- Coverage     97.49%   97.41%   -0.09%     
- Complexity      957     1032      +75     
============================================
  Files           361      374      +13     
  Lines          6479     6763     +284     
============================================
+ Hits           6317     6588     +271     
- Misses          162      175      +13     

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