Add example output in documentaion for az cli commands

[samMeow]

Related command
All az storage blob related commands

Is your feature request related to a problem? Please describe.
There is no example output or error in documentation (e.g. https://learn.microsoft.com/en-us/cli/azure/storage/blob?view=azure-cli-latest#az-storage-blob-show).
This cause inconvenience to developer who dont have azure cli in local environment.

Describe the solution you'd like
Add at least one example output for each command.

Additional context
A comparison on aws s3 ls commands documentation: https://docs.aws.amazon.com/cli/latest/reference/s3/ls.html

[yonzhan]

Thank you for opening this issue, we will look into it.