feat: add nydusify commit command

[PerseidMeteor]

Relevant Issue (if applicable)

support nydus commit operation

Details

Please describe the details of PullRequest.

Types of changes

What types of changes does your PullRequest introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

Go over all the following points, and put an x in all the boxes that apply.

• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[imeoer]

Thanks for the implementation! Please also add a test case in https://github.com/dragonflyoss/nydus/tree/master/smoke/tests (maybe create a commit_test.go ?).

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 34 lines in your changes are missing coverage. Please review.

Project coverage is 61.29%. Comparing base (a0ec880) to head (5f2790f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1543      +/-   ##
==========================================
- Coverage   61.35%   61.29%   -0.06%     
==========================================
  Files         144      144              
  Lines       47001    47035      +34     
  Branches    44537    44537              
==========================================
- Hits        28837    28832       -5     
- Misses      16685    16719      +34     
- Partials     1479     1484       +5     

Files	Coverage Δ
contrib/nydusify/cmd/nydusify.go	14.32% <0.00%> (-0.77%)	⬇️

... and 2 files with indirect coverage changes

[PerseidMeteor]

Thanks for the implementation! Please also add a test case in https://github.com/dragonflyoss/nydus/tree/master/smoke/tests (maybe create a commit_test.go ?).

I am sorry for I was too late because of my Spring Festival holiday. Commit smoke test was added.
Have a nice day!

[davidstack]

very nice pr

[Desiki-high]

Thanks for your pr, please fix the golang-lint.

[davidstack]

@imeoer which release will contain this pr？ we are waiting for this pr for a long time. thanks

[imeoer]

@imeoer which release will contain this pr？ we are waiting for this pr for a long time. thanks

Thanks for waiting, it should be included in the next release, v2.3.0.

[imeoer]

It seems the CI broken.

[PerseidMeteor]

It seems the CI broken.

It made me confused. Is there any idea to slove this problem?