[Question]: Stop using Kotlin Gradle plugin

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What is your question?

Flutter 3.44 requires all software packages to use built-in Kotlin instead of the Kotlin Gradle plugin.
Read more: https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-plugin-authors

Checklist before submitting a question

• I searched issues in this repository and couldn't find such bug/problem
• I Google'd a solution and I couldn't find it
• I searched on StackOverflow for a solution and I couldn't find it
• I read the README.md file of the plugin
• I am using the latest version of the plugin
• All dependencies are up to date with flutter pub upgrade
• I did a flutter clean
• I tried running the example project