feat: GitHub OAuth mechanism implemented

WotBlitzStatisticsPro.GraphQl/GitHubOauth/GitHubOauthAppConfiguration.cs

@@ -0,0 +1,20 @@
+namespace WotBlitzStatisticsPro.GraphQl.GitHubOauth
+{
+    public class GitHubOauthAppConfiguration
+    {
+        /// <summary>
+        /// Github OAuth clientId
+        /// </summary>
+        public string? ClientId { get; set; }
+
+        /// <summary>
+        /// GutHub OAuth client secret
+        /// </summary>
+        public string? ClientSecret { get; set; }
+
+        /// <summary>
+        /// GutHub user, that allowed to make dictionary updates mutation
+        /// </summary>
+        public string AllowedUser { get; set; } = "DrMboga";
+    }
+}