Proposal: Adding Plugin / hook system feature

[densogiaichned]

This PR adds plugin/hook system to TcUnit-Runner, and The plugins are loaded via Managed Extensibility Framework (MEF), see https://learn.microsoft.com/en-us/dotnet/framework/mef/

It also introduces a kind of hook-system, where hooks are executed during execution of TcUnit-Runner. These hooks are for example:

• after solution has been loaded
• before build
• after build
• before activating configuration
• after running tests
• ...

A plugin must implement these hooks, e.g. IAfterSolutionLoadedHook. Additionally, configuration of these hooks is done via a dotfile named .TcUnitRunner.

Since plugins are optional and only available on runtime, they could help to mitigate issues regarding newer TwinCAT versions/funktions, like

24 or #25.

I've marked this PR as 'draft', to discuss if this proposal is useful, or introduces other unforeseen issues/problems.

Thanks in advance!

[sagatowski]

This project is archived. Replacement for it is in the works.