Refactor code sharing between extensions

[epresi]

In order to support VS2022 we need to refactor the existing code:

• We should use the official Visual Studio SDK as the current one (Madskristensen.VisualStudio.SDK) is deprecated as it is legacy and is no longer maintained
• The current implementation is not the suggested way by Microsoft. We should share the code between extensions, without referencing a Visual Studio SDK. The SDK should come from the extension project.
• Also we have to refactor the analytics, so it could be used in the ProjectTemplateWizard.
  • Refactoring the analytics made it possible to include the Visual Studio (IDE) version in every event.

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).
• Performance improvement
• Refactoring (so no functional change)
• Other (docs, build config, etc)

Checklist:

• I've added tests for my code. (most of the time mandatory)
• I have added an entry to the changelog. (mandatory)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.