Add support for agreements in PowerShell install flow

[denelon]

Description of the new feature / enhancement

The PowerShell module doesn't appear to support the explicit agreements flow at the moment on the CLI.

winget install Microsoft.PowerAutomateDesktopwould require me to accept package agreements, but I could get around those by using: Install-WinGetPackage -Id Microsoft.PowerAutomateDesktop

Proposed technical implementation details

No response