Maven/Gradle Rainbow Gum bundle should have pattern and friends as scope compile

[agentgt]

PS: one small suggestion though, you may have noticed that I did include not just core, but also pattern explicitly, as having it pulled transitively by gradle does not make it accessible as implementation even if io.jstach.rainbowgum:rainbowgum is included as such. I think to have a better developer ergonomic, when including io.jstach.rainbowgum:rainbowgum, the transitive dependencies should be pulled in with the same scope so that having implementation("io.jstach.rainbowgum:rainbowgum:0.2.0") is enough. When just wanting to use the defaults, having runtimeOnly("io.jstach.rainbowgum:rainbowgum:0.2.0") should be sufficient.

Originally posted by @cmdjulian in #55 (comment)