fix: support both gradle and gradle.kts file formats #305

[yyyng2]

Description

• Add .kts extension check in androidAppBuildGradle path
• Update regex patterns to match Kotlin DSL syntax
• Handle both file formats when reading gradle contents
• Prioritize checking .kts files before .gradle files (new projects are more likely to use .kts format)

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]

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