Create document for Feature PowerShell Core usage

[tungbq]

Feature PowerShell Core has been introduced in #192, we need to have a usage document for this, requirement as below:

• Add PowerShell usage document in https://github.com/tungbq/devops-toolkit/tree/main/docs/usage (similar to another tool)
• Link the document to the TODO column of the usage table
  
• Link Powershell section to https://github.com/tungbq/devops-toolkit/blob/main/docs/usage/README.md#the-devops-toolkit-usage