Release 2.4.0

Although this release contains some API changes and a lot of internal changes, consumers will likely not be affected.

• Core: AHandler.FindAllGamesById now returns IDictionary<> instead of Dictionary<>
• Core: changed Result<TGame> from a record struct to a custom readonly struct
• Steam: added SteamGame.GetManifestPath that returns the absolute path to the parsed manifest. This is useful if you need to extract more information from the manifest, after the game has been found.
• Internal: restructured the project and reworked all tests