Added MacOS

This happened:

• Added MacOS support for GetAllSteamGameIds() and GetAllDownloadingGames*()
• upgraded to .NET 8
• renamed background stuff
• updated the README.

I skipped the 0.0.5 here on GH.. woops

V0.0.4 - A few changes

Release Notes:

• Renamed methods to indicate their asynchronous nature for improved clarity and usage.
• Added two new methods:
  • GetActiveDownloadedGames() retrieves the app IDs of the games that are currently downloading or updating.
  • GetActiveDownloadedGamesWithInfoAsync() returns a collection of RawSteamGame objects containing detailed information about the games that are actively downloading or updating.
• Introduced SteamFilesWithSignatures() method to obtain information from the "steam.signatures" file as SteamSignatureValue objects. This provides details such as file paths, hash values, CRC values, and more.
• Upgraded Newtonsoft.Json to version 13.0.3 for improved functionality and compatibility.

These changes enhance the functionality and usability of the library by providing more comprehensive information about active game downloads, introducing a new method for obtaining signature file details, and incorporating the latest version of the Newtonsoft.Json library.

V0.0.2

Nuget is up under: https://www.nuget.org/packages/SteamGamesNet

Should be working fine, just open an issue for anything.