OpenRewrite for Grails 7

[jdaugherty]

Feature description

Add openrewrite scripts to facilitate easier upgrades to Grails 7

[sbglasius]

@jdaugherty you should touch base with @dauer You can ask me for his out-of-band contact info

[jdaugherty]

See for example: https://github.com/dauer/grails-openrewrite-playground

[jdaugherty]

May be possible to do something similar to https://aws.amazon.com/q/developer/code-transformation/ for automated GitHub action updates.

[jdaugherty]

See how micronaut handles this:

• https://micronaut.io/2023/07/14/upgrade-to-micronaut-framework-4-with-openrewrite-and-maven/
• https://docs.openrewrite.org/recipes/java/micronaut