Add changelog during update

Thanks @Abrynos

ArchiSteamFarm/ASF.cs

@@ -197,6 +197,14 @@ namespace ArchiSteamFarm {
 					return null;
 				}
 
+				if (!string.IsNullOrEmpty(releaseResponse.ReleaseNotesInMarkdown)) {
+					string plainText = Utilities.MarkdownToText(releaseResponse.ReleaseNotesInMarkdown);
+
+					if (!string.IsNullOrEmpty(plainText)) {
+						ArchiLogger.LogGenericInfo(string.Format(Strings.UpdateChangelog, plainText));
+					}
+				}
+
 				ArchiLogger.LogGenericInfo(string.Format(Strings.UpdateDownloadingNewVersion, newVersion, binaryAsset.Size / 1024 / 1024));
 
 				WebBrowser.BinaryResponse response = await Program.WebBrowser.UrlGetToBinaryWithProgress(binaryAsset.DownloadURL).ConfigureAwait(false);

ArchiSteamFarm/IPC/Controllers/Api/WWWController.cs

@@ -63,7 +63,7 @@ namespace ArchiSteamFarm.IPC.Controllers.Api {
 				return BadRequest(new GenericResponse<string>(false, string.Format(Strings.ErrorIsEmpty, nameof(text))));
 			}
 
-			return Ok(new GenericResponse<string>(ArchiSteamFarm.Utilities.MarkdownToText(text)));
+			return Ok(new GenericResponse<string>(Utilities.MarkdownToText(text)));
 		}
 
 		[HttpPost("Send")]

ArchiSteamFarm/Json/GitHub.cs

@@ -30,6 +30,9 @@ namespace ArchiSteamFarm.JSON {
 			[JsonProperty(PropertyName = "assets", Required = Required.Always)]
 			internal readonly HashSet<Asset> Assets;
 
+			[JsonProperty(PropertyName = "body", Required = Required.Always)]
+			internal readonly string ReleaseNotesInMarkdown;
+
 			[JsonProperty(PropertyName = "tag_name", Required = Required.Always)]
 			internal readonly string Tag;
 

ArchiSteamFarm/Localization/Strings.Designer.cs

@@ -1251,6 +1251,16 @@ namespace ArchiSteamFarm.Localization {
             }
         }
         
+        /// <summary>
+        /// Wyszukuje zlokalizowany ciąg podobny do ciągu Changelog:
+        ///{0}.
+        /// </summary>
+        internal static string UpdateChangelog {
+            get {
+                return ResourceManager.GetString("UpdateChangelog", resourceCulture);
+            }
+        }
+        
         /// <summary>
         /// Wyszukuje zlokalizowany ciąg podobny do ciągu Checking for new version....
         /// </summary>

ArchiSteamFarm/Localization/Strings.resx

@@ -658,4 +658,9 @@ StackTrace:
     <value>Workaround for {0} bug has been triggered.</value>
     <comment>{0} will be replaced by the bug's name provided by ASF</comment>
   </data>
+  <data name="UpdateChangelog" xml:space="preserve">
+    <value>Changelog:
+{0}</value>
+    <comment>{0} will be replaced by complete changelog text from GitHub (in english). Please note that this string should include newlines for formatting.</comment>
+  </data>
 </root>

ArchiSteamFarm/Utilities.cs

@@ -30,6 +30,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Humanizer;
 using Humanizer.Localisation;
+using Markdig;
 
 namespace ArchiSteamFarm {
 	internal static class Utilities {
@@ -183,7 +184,7 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
-			string plainText = Markdig.Markdown.ToPlainText(markdownText);
+			string plainText = Markdown.ToPlainText(markdownText);
 			if (plainText == null) {
 				ASF.ArchiLogger.LogNullError(nameof(plainText));
 				return null;