Maven: openrewrite should support AddModule / RemoveModule

What problem are you trying to solve?

OpenRewrite has recipes that add and remove plugins / dependencies / etc. Openrewrite should also be able to add or remove a <module/> to a pom's <modules/>

What precondition(s) should be checked before applying this recipe?

Describe the situation before applying the recipe

For AddModule - the situation before applying the recipe might be

<modules>
    <module>foo</module>
</modules>

Describe the situation after applying the recipe

For AddModule - the situation after applying the recipe to add a "bar" module would be

<modules>
    <module>foo</module>
    <module>bar</module>
</modules>

Have you considered any alternatives or workarounds?

Any additional context

Are you interested in contributing this recipe to OpenRewrite?

No file, test, or entry point is named. Start by locating the existing recipes for adding or removing Maven plugins or dependencies, then identify how module entries in a pom are represented and tested. Done means AddModule can add the requested module and RemoveModule can remove one, while preserving the demonstrated module structure.