Implement `repository update` cmd

[bupd]

Summary

We have an empty repository update cmd which does nothing - its better to remove that placeholder.

https://github.com/goharbor/harbor-cli/blob/main/cmd/harbor/root/repository/update.go

we should update the repository update to do the following its currently missing these - not remove the update cmd - it should be added.

See this example curl request

curl 'https://demo.goharbor.io/api/v2.0/projects/bc-project/repositories/bc-image' \
  -X 'PUT' \
  -H 'content-type: application/json' \
  --data-raw '{"description":"hello"}'

https://demo.goharbor.io/harbor/projects/5588/repositories/bc-image/info-tab - see there is a field update repository info - so we should support that.

See the below image for what the update cmd should do.

[rshdhere]

taking this one

[bupd]

I just found out - we should update the repository update to do the following its currently missing these - not remove the update cmd - it should be added.

See this example curl request

curl 'https://demo.goharbor.io/api/v2.0/projects/bc-project/repositories/bc-image' \
  -X 'PUT' \
  -H 'content-type: application/json' \
  --data-raw '{"description":"hello"}'

https://demo.goharbor.io/harbor/projects/5588/repositories/bc-image/info-tab - see there is a field update repository info - so we should support that.

See the below image for what the update cmd should do.

[bhavyaKhatri2703]

im taking this one