fix: FlutterFire CLI is not able to handle projects that use…

[devNamanG]

… Kotlin DSL for Gradle #305

Description

Added support for updating android/build.gradle.kts, android/settings.gradle.kts and android/app/build.gradle.kts files.
Added RegExps, functions to handle Kotlin Gradle DSL files if Groovy Gradle DSL files are not found
We assume that the project does not use a mix of Groovy and Kotlin DSL gradle files.
We check whether the android/build.gradle file exists or not. If it exists, the existing code handles updating the files.
If it does not not exist, we proceed to check whether android/build.gradle.kts file exists.
If it does, we use Kotlin DSL configuration.
If both configuration files are not found, an Exception is thrown.

Type of Change

• ✨ feat -- New feature (non-breaking change which adds functionality)
• 🛠️ fix -- Bug fix (non-breaking change which fixes an issue)
• ❌ ! -- Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 refactor -- Code refactor
• ✅ ci -- Build configuration change
• 📝 docs -- Documentation
• 🗑️ chore -- Chore

[CLAassistant]

All committers have signed the CLA.

[devNamanG]

Okay so I tried running the code on a project with Kotlin DSL files, and for some reason, it is not updating the those files, even though it does write google-services.json. Can someone check this out as well? The existing plugin code seems to not even call the updated gradleContentUpdates function. It would be really helpful if a maintainer checks this out, thank you!