Add a 'run' goal that allows maven to run a bootstrap packaged
application in-place. Similar to the maven-exec-plugin but also
adds src/main/resources to the classpath, allowing 'instant refresh'
for web developers.
Issue: #53592789
This fixed the immediate problem with Thymeleaf, but leaves open
the question of how we can prevent other race conditions developing.
As long as the container can start handling requests before the Spring
context is refreshed this will be a source of bugs.
[Fixes#53482411] [bs-235] Race condition in Thymeleaf
