docs: auto generate pouch cli/api docs via code

[pouchrobot]

Signed-off-by: pouchrobot [email protected]

1.Describe what this PR did
This PR is automatically done by AI-based collaborating robot.
Pouchrobot will auto-generate cli/api document via https://github.com/spf13/cobra/tree/master/doc every day.

2.Does this pull request fix one issue?
None

3.Describe how you did it
First, execute command "make client" to build new pouch cli;
Second, execute command "./pouch gen-doc" to generate new cli docs.

For API part, we use a tool swagger2markup to make it.

4.Describe how to verify it
None

5.Special notes for reviews
The cli/api doc must be automatically generated.

[codecov]

Codecov Report

Merging #2293 into master will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2293      +/-   ##
==========================================
- Coverage   66.75%   66.67%   -0.09%     
==========================================
  Files         208      208              
  Lines       16971    16971              
==========================================
- Hits        11329    11315      -14     
- Misses       4275     4283       +8     
- Partials     1367     1373       +6

Flag	Coverage Δ
#criv1alpha1test	32.42% <ø> (-0.18%)	⬇️
#criv1alpha2test	36% <ø> (-0.18%)	⬇️
#integrationtest	39.45% <ø> (-0.04%)	⬇️
#nodee2etest	33.35% <ø> (+0.07%)	⬆️
#unittest	23.75% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
apis/server/utils.go	61.9% <0%> (-4.77%)	⬇️
ctrd/watch.go	75.75% <0%> (-4.55%)	⬇️
daemon/containerio/cri_log_file.go	84.31% <0%> (-3.93%)	⬇️
cri/v1alpha2/cri_wrapper.go	61.2% <0%> (-1.2%)	⬇️
cri/v1alpha1/cri.go	61.27% <0%> (-0.33%)	⬇️
daemon/mgr/container.go	57.23% <0%> (-0.21%)	⬇️
cri/v1alpha2/cri.go	66.17% <0%> (ø)	⬆️

[CLAassistant]

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[allencloud]

LGTM