PoC: Add rewrite support for errorprone.refasterrules

[Pankraz76]

adding

• https://error-prone.picnic.tech/refasterrules/StringRules

refs:

• Convert value.trim().length() < 1 to value.isBlank() < 1 openrewrite/rewrite-apache#90
• Use Collections#isEmpty or String#isEmpty apache/maven#10943
• PoC: Add rewrite support for errorprone.refasterrules apache/kafka#20219

fyi:

@gnodet
@iddeepak

After creating the PR, please add a commit that adds a bullet-point under the [Unreleased] section of CHANGES.md, plugin-gradle/CHANGES.md, and plugin-maven/CHANGES.md which includes:

• a summary of the change
• either
  • a link to the issue you are resolving (for small changes)
  • a link to the PR you just created (for big changes likely to have discussion)

If your change only affects a build plugin, and not the lib, then you only need to update the plugin-foo/CHANGES.md for that plugin.

If your change affects lib in an end-user-visible way (fixing a bug, updating a version) then you need to update CHANGES.md for both the lib and all build plugins. Users of a build plugin shouldn't have to refer to lib to see changes that affect them.

This makes it easier for the maintainers to quickly release your changes :)

[Pankraz76]

rewrite takes 6m 55s on CI

• https://github.com/diffplug/spotless/actions/runs/16647908805/job/47112927087
• loader org.openrewrite.gradle.RewriteClassLoader attempted duplicate class definition openrewrite/rewrite-gradle-plugin#212

FYI:
here its somehow executed sequentiell, while everything else remains concurrent.

@marcphilipp
@vlsi
@timtebeek

[Pankraz76]

waiting for enabler:

• Issue #2634: Add StreamRulesRecipes #2588

[Pankraz76]

closing to stop starting start finishing.