Migrate View modules from Java to Kotlin

[OneXeor]

Description

All View modules are written in Java. Migrate to Kotlin for consistency with modern Android development and the Compose module.

Tasks

• Convert ParticlesView.java → ParticlesView.kt
• Convert DotItem.java → DotItem.kt
• Convert ParticleProgressBar.java → ParticleProgressBar.kt
• Convert Ball.java → Ball.kt
• Convert PulseButton.java → PulseButton.kt
• Convert BottomNavigationBar.java → BottomNavigationBar.kt
• Convert CenterNavigationButton.java → CenterNavigationButton.kt
• Convert demo app MainActivity.java → MainActivity.kt
• Update build.gradle files with Kotlin plugin

Benefits

• Null safety
• Concise syntax
• Coroutines support for animations
• Consistency with Compose module
• Modern Android standard