I only recommend using IntelliJ IDEA to edit this project.
To run the project on 1.17+ branches you'll need to use the JetBrains Runtime
(vanilla JBR 17 without fastdebug) as the project's JDK, or delete the
-XX:+AllowEnhancedClassRedefinition JVM arguments from the gradle build script
and rerun :genIntellijRuns.
Other than that, Forge development conventions apply. Remember to reimport the project
(Reload Gradle Project) and rerun :genIntellijRuns after checking out a branch for a
different Minecraft version.
Also, developing a feature across multiple Minecraft versions is not an enjoyable experience, so I recommend against it. A trick is checking out each branch to a different local project to cut down on checkout+reimport times.