Development Improvements

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@graemerocher

I have difficulties with Intellij IDEA. I think maybe I don't have enough experience with Gradle but seems there is a need for documentation for this as well. What I want to do is just adding a test case and changing necessary things in the project without rebuild of IDEA for each time. I think having a documentation about will be super good. I will add my points which can be improved.

1. In the Micronaut Core documentation there is some section about adding annotation processors to class path for testing. Even if I add, I have to rebuild entire project in case a change of a code change. What is the proper way for development? I have some problems with Gradle Dameons too.
2. I think it is very helpful to see generated intermediate generated classes. I usually open target folders for generated classes. Is there an easy way for it?
3. How can I debug annotation processors? Since they are triggered at build time, is it possible to put a breakpoint and follow generation?

Start with the Micronaut Core documentation section on adding annotation processors for testing, then review the IntelliJ IDEA and Gradle development concerns listed in this issue. Document the proper workflow for changing code and tests without rebuilding the IDE, viewing generated classes, and debugging annotation processors; done means each question has a clear, verified answer.

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