feat: add stats cmd to stats power

[LinZexiao]

关联的Issues (Related Issues)

close filecoin-project/venus#5108

改动 (Proposed Changes)

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[simlecode]

+LGTM

[codecov-commenter]

Codecov Report

Merging #188 (36d60bf) into master (0b20156) will decrease coverage by 0.13%.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #188      +/-   ##
==========================================
- Coverage   24.78%   24.64%   -0.14%     
==========================================
  Files         176      177       +1     
  Lines       18671    18794     +123     
==========================================
+ Hits         4627     4632       +5     
- Misses      13480    13599     +119     
+ Partials      564      563       -1     

Flag	Coverage Δ
unittests	24.64% <0.00%> (-0.14%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cli/stats.go	0.00% <0.00%> (ø)
cmd/venus-market/main.go	0.00% <0.00%> (ø)
network/host.go	0.00% <0.00%> (ø)
paychmgr/simple.go	80.49% <0.00%> (+1.13%)	⬆️