[feature] add inspect format for image network and volume

[Letty5411]

Ⅰ. Describe what this PR did

Add inspect format option for image/network/volume.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how you did it

Ⅳ. Describe how to verify it

#pouch network inspect -f {{.Name}} bridge
bridge

#pouch image inspect -f {{.Name}} docker.io/library/busybox:latest
docker.io/library/busybox:latest

Ⅴ. Special notes for reviews

[Letty5411]

CI failed due to issue #815 , not relate to this PR.

[codecov-io]

Codecov Report

Merging #871 into master will increase coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master    #871      +/-   ##
=========================================
+ Coverage   14.89%   14.9%   +<.01%     
=========================================
  Files         114     114              
  Lines        6826    6825       -1     
=========================================
  Hits         1017    1017              
+ Misses       5723    5722       -1     
  Partials       86      86

Impacted Files	Coverage Δ
cli/image_inspect.go	0% <0%> (ø)	⬆️
cli/network.go	0% <0%> (ø)	⬆️
cli/volume.go	9.43% <0%> (+0.05%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1564d7a...5d13f60. Read the comment docs.

[HusterWan]

LGTM