Add support Telegram Sticker .tgs in Lottie Integration (#659)

## What does this change?

Due to #656, Lottie supports Telegram Stickers (.tgs) and `.tgs` files can be loaded by providing a special decoder. This MR will support `.tgs`.

Proof of work:
https://github.com/user-attachments/assets/19ab6acb-793a-4f9c-b6b3-4c3524511d4d

Author: dungngminh

README.md

@@ -408,9 +408,9 @@ Widget build(BuildContext context) {
 |---------------------------------------------------------|----------------------|-----------------------|-------------------------------------------|
 | [flutter_svg](https://pub.dev/packages/flutter_svg)     | .svg                 | `flutter_svg: true`   | Assets.images.icons.paint.**svg()**       |
 | [rive](https://pub.dev/packages/rive)                   | .riv                 | `rive: true`          | Assets.rive.vehicles.**rive()**           |
-| [lottie](https://pub.dev/packages/lottie)               | .json, .zip, .lottie | `lottie: true`        | Assets.lottie.hamburgerArrow.**lottie()** |
+| [lottie](https://pub.dev/packages/lottie)               | .json, .zip, .lottie, .tgs | `lottie: true`        | Assets.lottie.hamburgerArrow.**lottie()** |
 
-**Note:** For [lottie](https://pub.dev/packages/lottie) integration with `.lottie` files, you must add a custom decoder via `decoder` parameter to select the correct .json file from a dotlottie (.lottie) archive, see [lottie's document](https://pub.dev/packages/lottie#telegram-stickers-tgs-and-dotlottie-lottie) for more information.
+**Note:** For [lottie](https://pub.dev/packages/lottie) integration with `.lottie` and `.tgs` files, you must add a custom decoder via `decoder` parameter, see [lottie's document](https://pub.dev/packages/lottie#telegram-stickers-tgs-and-dotlottie-lottie) for more information.
 
 In other cases, the asset is generated as String class.
 

examples/example/assets/lottie/cat.tgs

@@ -82,6 +82,9 @@ class $AssetsLottieGen {
   LottieGenImage get alarmClockLottieV440 =>
       const LottieGenImage('assets/lottie/alarm-clock-lottie-v440.json');
 
+  /// File path: assets/lottie/cat.tgs
+  LottieGenImage get cat => const LottieGenImage('assets/lottie/cat.tgs');
+
   /// File path: assets/lottie/geometrical-animation.json
   LottieGenImage get geometricalAnimation =>
       const LottieGenImage('assets/lottie/geometrical-animation.json');
@@ -101,6 +104,7 @@ class $AssetsLottieGen {
   List<LottieGenImage> get values => [
         xuiIZ9X1Rf,
         alarmClockLottieV440,
+        cat,
         geometricalAnimation,
         hamburgerArrow,
         spinningCarrousel,

examples/example/lib/gen/assets.gen.dart

@@ -3,6 +3,7 @@ import 'package:example/gen/colors.gen.dart';
 import 'package:example/gen/fonts.gen.dart';
 import 'package:example_resources/gen/assets.gen.dart';
 import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
 
 void main() {
   print(MyAssets.images.chip4.chip4.flavors);
@@ -59,6 +60,13 @@ class MyApp extends StatelessWidget {
                     fit: BoxFit.contain,
                   ),
                 ),
+                SizedBox(
+                  width: 200,
+                  height: 200,
+                  child: MyAssets.lottie.cat.lottie(
+                    decoder: LottieComposition.decodeGZip,
+                  ),
+                ),
                 MyAssets.images.chip1.image(),
                 Container(
                   height: 400,

examples/example/lib/main.dart

@@ -17,6 +17,9 @@ import 'package:vector_graphics/vector_graphics.dart' as _vg;
 class $AssetsImagesGen {
   const $AssetsImagesGen();
 
+  /// File path: assets/images/cat.tgs
+  LottieGenImage get cat => const LottieGenImage('assets/images/cat.tgs');
+
   /// File path: assets/images/dart.svg
   SvgGenImage get dart => const SvgGenImage('assets/images/dart.svg');
 
@@ -36,7 +39,7 @@ class $AssetsImagesGen {
 
   /// List of all assets
   List<dynamic> get values =>
-      [dart, favorite, flutter3, runningCarOnRoad, skills];
+      [cat, dart, favorite, flutter3, runningCarOnRoad, skills];
 }
 
 class $AssetsUnknownGen {

examples/example_resources/assets/images/cat.tgs

@@ -122,7 +122,7 @@ ${isPackage ? "\n  static const String package = '$packageName';" : ''}
   bool get isConstConstructor => true;
 
   bool isLottieFile(AssetType asset) {
-    if (asset.extension == '.lottie') {
+    if (asset.extension == '.lottie' || asset.extension == '.tgs') {
       return true;
     }
     if (!_supportedMimeTypes.contains(asset.mime)) {

examples/example_resources/lib/gen/assets.gen.dart

@@ -12,3 +12,4 @@ flutter:
     - assets/lottie/hamburger_arrow.json
     - assets/lottie/spinning_carrousel.zip
     - assets/lottie/XuiIZ9X1Rf.lottie
+    - assets/lottie/cat_cat.tgs