Major refactor - PSCustomObjects and powershell classes #133

Job	Run time
Pester tests on powershell.exe (windows-latest)	2m 10s
Pester tests (ubuntu-latest)	37s
Pester tests (macos-latest)	28s
Pester tests (windows-2022)	51s
Pester tests on powershell.exe (windows-2022)	1m 54s
Pester tests (windows-latest)	1m 12s
	7m 12s

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