add github action for coverage, lint and vulnerability

[WindzCUHK]

Signed-off-by: wfan [email protected]

Description

• add github action for coverage, lint and vulnerability
• fix lint problems

Type of change

• Bug fix
• New feature
• Refactoring (no functional changes, no api changes)
• Non-code changes (update documentation, pipeline, etc.)

Flags

• Breaks backward compatibility
• Requires a documentation update
• Has untestable code

---

Checklist

• Followed the guidelines in the CONTRIBUTING document
• Added prefix [skip ci]/[ci skip]/[no ci]/[skip actions]/[actions skip] in the PR title if necessary
• Tested and linted the code
• Commented the code
• Made corresponding changes to the documentation
• Passed all pipeline checking

Checklist for maintainer

• Use Squash and merge
• Double-confirm the merge message has prefix [skip ci]/[ci skip]/[no ci]/[skip actions]/[actions skip]
• Delete the branch after merge

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@78de9da). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #6   +/-   ##
=========================================
  Coverage          ?   94.59%           
=========================================
  Files             ?       21           
  Lines             ?     1850           
  Branches          ?        0           
=========================================
  Hits              ?     1750           
  Misses            ?       73           
  Partials          ?       27           

Flag	Coverage Δ
unittests	94.59% <0.00%> (?)

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

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