add sign and send txs in file

[bysomeone]

• 增加签名和发送批量交易命令（数据在指定文件中按行排列）

• 扩展wallet sign命令， -d指定数据文件时，执行从文件中解析数据批量签名， -o指定输出文件（默认sign.out）

• 扩展wallet send命令， -d指定数据文件时，执行从文件中解析数据批量发送

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.08% ⚠️

Comparison is base (c909f4d) 61.88% compared to head (394a879) 61.80%.

❗ Current head 394a879 differs from pull request most recent head 04c5c38. Consider uploading reports for the commit 04c5c38 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1307      +/-   ##
==========================================
- Coverage   61.88%   61.80%   -0.08%     
==========================================
  Files         171      171              
  Lines       23741    23741              
==========================================
- Hits        14692    14674      -18     
- Misses       7213     7228      +15     
- Partials     1836     1839       +3     

see 6 files with indirect coverage changes

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[33cn]

🎉 This PR is included in version 1.68.1 🎉

The release is available on GitHub release

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