Information

Minecraft version: 1.19.2
Modloader: Forge / Fabric
Environment: Singleplayer

Mod name: Rain Be Gone Ritual
Mod version: 3.0

IDE : IntelliJ IDEA 2022.3

Context

Hello there. I'm kind of new to modding, and I'm used to tweak and recompile mod sources to my personal tastes for my singleplayer world.

It's the first time I encounter a mod that include both forge and fabric loaders in the same file, and I'm having difficulties compiling and generating the mod JAR file.
(Until now, for other mods, I only had to run "fabric/runClient" and "build/build" tasks, but it seems to be different here)

Question

So my question is the following : What gradle tasks should I run in order to generate the final JAR file, which can then be used in my fabric 1.19.2 singleplayer world (and where will it generate said JAR file) ?

Additional notes

It also seems that I can't run forge client (from the "forgegradle runs/Client" task) without getting an error with the Collective library failling to load at startup).
Am I running the wrong task ? Or missing some ?