Migrate Gradle project dependencies to version catalog

Migrates Gradle project dependencies to use the version catalog feature. Supports migrating dependency declarations of various forms:

• String notation: "group:artifact:version"
• Map notation: group: 'group', name: 'artifact', version: 'version'
• Property references: "group:artifact:$version" or "group:artifact:${version}"

The recipe will:

• Create a gradle/libs.versions.toml file with version declarations
• Replace dependency declarations with catalog references (e.g., libs.springCore)
• Migrate version properties from gradle.properties to the version catalog
• Preserve project dependencies unchanged

Note: If a version catalog already exists, the recipe will not modify it.