upgrade-to-quarkus3 - build.gradle.kts support

[cthiebault]

Describe the bug

jbang --fresh upgrade-to-quarkus3@quarkusio does not support Gradle with Kotlin DSL:

> jbang --fresh upgrade-to-quarkus3@quarkusio 
[jbang] Resolving dependencies...
[jbang]    org.slf4j:slf4j-simple:1.7.36
[jbang] Dependencies resolved
[jbang] Building jar...
This script will attempt to upgrade your Quarkus project to be compatible with Quarkus 3.

It will change files on disk - make sure to have all files committed or some other kind of backup before running it.

Waiting 3 seconds before starting...

3
2
1
Could not find pom.xml nor build.gradle file in current directory.

Expected behavior

No response

Actual behavior

No response

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

No response

GraalVM version (if different from Java)

No response

Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[quarkus-bot[bot]]

/cc @evanchooly (kotlin), @geoand (kotlin), @glefloch, @maxandersen (jbang), @quarkusio/devtools (jbang)