WavyAnimatedText for text with shadows issue

**Describe the bug**
WavyAnimatedText doesn't work as expected when the text has shadows, a copy of the shadow doesn't get animeted.

**To Reproduce**
// when i use it on the text the letters get animated but not the shadow of the text
1. AnimatedTextKit(
animatedTexts: [
WavyAnimatedText('Waves', textStyle: TextStyle(
shadows: const [
Shadow(
color: Colors.white, offset: Offset(-3.0, 3.0))
])),
],
),

**Expected behavior**
it is expected for the shadow of the to be animated and not remain still.

**Screenshots**

**Flutter:**
Flutter 3.13.6 • channel stable

**Dart:**
Dart 3.1.3

Look at the WavyAnimatedText implementation in the animated_text_kit package, likely in lib/src/animated_texts/wavy_animated_text.dart. The issue is that text shadows are not being animated along with the letters. Examine how the text painting is done and where the TextStyle, including shadows, is applied. Check the animation loop to see if the shadow properties are being updated. Run the example with a text shadow to reproduce the bug and verify the fix.

索引モデルが issue の本文から書いたものです。