Revert "Removed Telegram App"

This reverts commit 29bb5cc.

README.md

@@ -32,6 +32,7 @@ Currently supported App sources:
   - Jenkins Jobs
   - [APKMirror](https://apkmirror.com/) (Track-Only)
 - Other - App-Specific:
+  - [Telegram App](https://telegram.org)
   - [Neutron Code](https://neutroncode.com)
 - Direct APK Link
 - "HTML" (Fallback): Any other URL that returns an HTML page with links to APK files

lib/providers/source_provider.dart

@@ -25,6 +25,7 @@ import 'package:obtainium/app_sources/jenkins.dart';
 import 'package:obtainium/app_sources/neutroncode.dart';
 import 'package:obtainium/app_sources/sourceforge.dart';
 import 'package:obtainium/app_sources/sourcehut.dart';
+import 'package:obtainium/app_sources/telegramapp.dart';
 import 'package:obtainium/app_sources/tencent.dart';
 import 'package:obtainium/app_sources/uptodown.dart';
 import 'package:obtainium/components/generated_form.dart';
@@ -258,22 +259,6 @@ appJSONCompatibilityModifiers(Map<String, dynamic> json) {
       replacementAdditionalSettings['matchGroupToUse'] = "1";
       additionalSettings = replacementAdditionalSettings;
     }
-    // Telegram App from before it was removed should be converted to Direct APK Link (#1943)
-    if (json['url'] == 'https://telegram.org' &&
-        json['id'] == 'org.telegram.messenger.web' &&
-        json['author'] == 'Telegram' &&
-        json['name'] == 'Telegram' &&
-        json['overrideSource'] == null &&
-        additionalSettings['trackOnly'] == false &&
-        additionalSettings['versionExtractionRegEx'] == '' &&
-        json['lastUpdateCheck'] != null) {
-      json['url'] = 'https://telegram.org/dl/android/apk';
-      var newSource = DirectAPKLink();
-      json['overrideSource'] = newSource.runtimeType.toString();
-      var replacementAdditionalSettings = getDefaultValuesFromFormItems(
-          newSource.combinedAppSpecificSettingFormItems);
-      additionalSettings = replacementAdditionalSettings;
-    }
   }
   json['additionalSettings'] = jsonEncode(additionalSettings);
   // F-Droid no longer needs cloudflare exception since override can be used - migrate apps appropriately
@@ -879,6 +864,7 @@ class SourceProvider {
         Tencent(),
         Jenkins(),
         APKMirror(),
+        TelegramApp(),
         NeutronCode(),
         DirectAPKLink(),
         HTML() // This should ALWAYS be the last option as they are tried in order