Removed NioTSO client and server

- NioTSO client isn't needed because we're using RayLib
- Added FreeSO's API server to handle most backend operations

server/FSO.Server.Api.Core/Services/GithubUpdateUploader.cs

@@ -0,0 +1,61 @@
+using FSO.Server.Common.Config;
+using Octokit;
+using Octokit.Internal;
+using System;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace FSO.Server.Api.Core.Services
+{
+    public class GithubUpdateUploader : IUpdateUploader
+    {
+        private GithubConfig Config;
+
+        private static string Description = "This is an automated client release produced by the master FreeSO server. " +
+            "These releases match up with a branch on GitHub, but with some addon content such as a custom catalog and splash. " +
+            "It can be downloaded and installed directly, but it is better to do so through the game's launcher/updater. \n\n" +
+            "The incremental update is applied by simply extracting the zip over the previous version of the game " +
+            "(though the updater still affords extra validation here)";
+
+        public GithubUpdateUploader(GithubConfig config)
+        {
+            Config = config;
+        }
+
+        public async Task<string> UploadFile(string destPath, string fileName, string groupName)
+        {
+            destPath = Path.GetFileName(destPath);
+            var credentials = new InMemoryCredentialStore(new Credentials(Config.AccessToken));
+
+            var client = new GitHubClient(new ProductHeaderValue(Config.AppName), credentials);
+
+            Release release;
+            try
+            {
+                release = await client.Repository.Release.Get(Config.User, Config.Repository, groupName);
+            }
+            catch (Exception)
+            {
+                release = null;
+            }
+            if (release == null) {
+                var newRel = new NewRelease(groupName);
+                newRel.Body = Description;
+                release = await client.Repository.Release.Create(Config.User, Config.Repository, newRel);
+            }
+
+            using (var file = File.Open(fileName, System.IO.FileMode.Open, FileAccess.Read, FileShare.Read)) {
+                try
+                {
+                    var asset = await client.Repository.Release.UploadAsset(release, new ReleaseAssetUpload(destPath, "application/zip", file, null));
+                    return asset.BrowserDownloadUrl;
+                } catch (Exception e)
+                {
+                    //last time i tried, it mysteriously failed here but the file was uploaded :thinking:
+                    Console.WriteLine($"!! Upload request for {destPath} failed, check it actually succeeded !! \n" + e.ToString());
+                    return $"https://github.com/{Config.User}/{Config.Repository}/releases/download/{groupName}/{destPath}";
+                }
+            }
+        }
+    }
+}