opt: add time flag for msg list command

[simlecode]

关联的Issues (Related Issues)

close filecoin-project/venus#6172

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

[codecov-commenter]

Codecov Report

Merging #375 (07998b7) into master (a6bebfc) will decrease coverage by 0.10%.
The diff coverage is 28.57%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #375      +/-   ##
==========================================
- Coverage   58.07%   57.97%   -0.10%     
==========================================
  Files          68       68              
  Lines        7616     7629      +13     
==========================================
  Hits         4423     4423              
- Misses       2836     2847      +11     
- Partials      357      359       +2     

Flag	Coverage Δ
unittests	57.97% <28.57%> (-0.10%)	⬇️

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

Files	Coverage Δ
api/messager_impl.go	74.24% <100.00%> (ø)
service/message_service.go	59.92% <100.00%> (ø)
models/mysql/message.go	74.45% <20.00%> (-0.73%)	⬇️
models/sqlite/message.go	81.53% <20.00%> (-0.79%)	⬇️
cli/msg.go	0.00% <0.00%> (ø)

[LinZexiao]

LGTM