Update to Pester v5

[vexx32]

PR Summary

Need to update the module for Pester v5, likely both the module tests and some of the koans themselves.

Context

This will resolve #391 fully, but will be a breaking change technically since we have to move to a new major Pester version. Many of the koans should be very compatible with Pester v5, but a complete pass is needed to ensure we aren't using any patterns in the koans that will break in Pester v5.

This also updates the code used in Measure-Koan to utilize some internal discovery mechanics of Pester. Unfortunately, using this during an ongoing test run will corrupt Pester's internal state, so the automated tests for this function have been flagged with -Skip for the time being, until a solution is found for that.

Changes

• Update private function tests.
• Update public function tests.
• Update Get-Karma to retrieve the correct information from the new Pester result object.
• Update EZOut format handlers to work correctly with the new result object types.
  • Verify these changes are working correctly.
  • Diagnose and resolve issue with formatter on MacOS (formatter only works once, and fails to retrieve meditation/koan flavor text from the module scope for display).
• Review koan topics to ensure they're v5 compatible and make necessary changes.
  • Introduction
  • Foundations
  • Cmdlets 1
  • Cmdlets 2
  • Constructs and Patterns
  • Katas
  • Modules

Checklist

• Pull Request has a meaningful title.
• Summarised changes.
• Pull Request is ready to merge & is not WIP.
• Added tests / only testable interactively.
  • Make sure you add a new test if old tests do not effectively test the code changed.
• Added documentation / opened issue to track adding documentation at a later date.