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/AWSUpdateUploader.cs

@@ -0,0 +1,54 @@
+using Amazon;
+using Amazon.Runtime;
+using Amazon.S3;
+using Amazon.S3.Model;
+using FSO.Server.Common.Config;
+using System;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace FSO.Server.Api.Core.Services
+{
+    public class AWSUpdateUploader : IUpdateUploader
+    {
+        private AWSConfig Config;
+        public AWSUpdateUploader(AWSConfig config)
+        {
+            Config = config;
+        }
+
+        public async Task<string> UploadFile(string destPath, string fileName, string groupName)
+        {
+            var region = Config.Region;
+            var bucket = Config.Bucket;
+            var s3config = new AmazonS3Config()
+            {
+                RegionEndpoint = RegionEndpoint.GetBySystemName(region),
+                Timeout = new TimeSpan(1, 0, 0),
+                ReadWriteTimeout = new TimeSpan(1, 0, 0),
+                MaxErrorRetry = 512
+            };
+
+            using (var aws = new AmazonS3Client(new BasicAWSCredentials(Config.AccessKeyID, Config.SecretAccessKey), s3config))
+            {
+                PutObjectRequest request = new PutObjectRequest()
+                {
+                    InputStream = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite),
+                    BucketName = bucket,
+                    CannedACL = S3CannedACL.PublicRead,
+                    Key = destPath
+                };
+                PutObjectResponse response = await aws.PutObjectAsync(request);
+
+                if (response.HttpStatusCode == System.Net.HttpStatusCode.OK)
+                {
+                    return $"https://s3.{region}.amazonaws.com/{bucket}/" + destPath;
+                }
+                else
+                {
+                    throw new Exception("Uploading file " + destPath + " failed with code " + response.HttpStatusCode + "!");
+                }
+            }
+        }
+    }
+}