Known Hotswap Agent 2.0.2 Reloading Limitations with Grails 7+

[jamesfredley]

Issue description

Changes to configure Hotswap Agent in an existing application, including automating the download and use on hotswap-agent.jar and gragent.jar: https://github.com/jamesfredley/hotswap-demo/commit/fb8386c50f7aad6aee1cefdbc37cc1571ad7d747

https://github.com/HotswapProjects/HotswapAgent/issues/581 - lacks Spring Boot 3.x.x and Spring Framework 6.x.x support, although it still works to some extent

Produces a lot of error logs, while still mostly working

Reloads automatically:

• adding a controller for an existing domain
• editing a controller
• editing an existing service

Does not work without a restart:

• new domain class
• editing domain classes
• editing a service
• grails generate-all, due to order files are generated

[jamesfredley]

Link to this issue added in documentation: https://github.com/apache/grails-core/pull/14969 & https://grails.apache.org/docs/snapshot/guide/gettingStarted.html#developmentReloading

[jdaugherty]

Note: we'll likely want to configure Grails 7 similar to how we used to configure Springloaded. https://github.com/apache/grails-core/pull/15096 removes spring loaded, but most of the example configuration provided by @jamesfredley will need the same changes as spring loaded