Feat: add user agent in config

[FogDong]

Signed-off-by: FogDong dongtianxin.tx@alibaba-inc.com

Description of your changes

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Base: 67.87% // Head: 67.78% // Decreases project coverage by -0.08% ⚠️

Coverage data is based on head (14d514f) compared to base (48df288).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
- Coverage   67.87%   67.78%   -0.09%     
==========================================
  Files          45       45              
  Lines        4043     4045       +2     
==========================================
- Hits         2744     2742       -2     
- Misses        941      944       +3     
- Partials      358      359       +1     

Flag	Coverage Δ
e2etests	24.33% <ø> (-0.06%)	⬇️
unit-test	65.37% <0.00%> (-0.04%)	⬇️

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

Impacted Files	Coverage Δ
cmd/main.go	1.22% <0.00%> (-0.02%)	⬇️
pkg/cue/packages/package.go	65.86% <0.00%> (-0.97%)	⬇️

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