V2.6.0 Release

[mukunku]

This is a bit of a chaotic release. I tried to organize the project so it makes a bit more sense but not sure if I achieved that 😅 .

I added unit tests to the project but consequently had to split the Parquet reading logic to another Class Library project "ParquetViewer.Engine" because I couldn't reference the main exe from the unit tests project.

Project level changes not mentioned in the release notes:

• Unit tests have been added! 🎉
• Switched to central package version management
• Renamed all the projects and solution to match the "ParquetViewer" name.
  • Had to update all namespaces too!
• Updated the readme to remove the possessive language since this is a community built tool now