feat: use more robust path parsing during import

using System.Text.RegularExpressions;

using System.Threading;

using System.Threading.Tasks;

using System.Web;

using Avalonia.Controls;

using Avalonia.Platform.Storage;

using GarrigueGamesLauncher.Interfaces;

    /// <returns>True if the game was successfully imported; otherwise, false.</returns>

    private async Task<bool> ImportGameAsync(IStorageFile file)

    {

        var zipPath = HttpUtility.UrlDecode(file.Path.AbsolutePath);

        var zipPath = file.TryGetLocalPath();

        if (zipPath == null)

        {

            _ = EnqueueImportErrorMessage(file, $"Could not get local path for file {file.Path}");

            return false;

        }

        var targetPath = Path.Join(TempDirPath, Guid.NewGuid().ToString());

        var result = await Unzip(zipPath, targetPath);