Out of date checker for powershell modules

[MariusStorhaug]

When starting the powershell module, check if there are newer versions of the module available.

Way to get this:

• Update-PSResource -Name 'modulename'

Example output of Oh my posh

A new release of Oh My Posh is available: v21.3.0 → v21.17.2
To upgrade, use the guide for your favorite package manager in the documentation:
https://ohmyposh.dev/docs/installation/windows#update

Example from PowerShells own notice: