Support c:chains tag

### Mod loader NeoForge ### Minecraft version 1.21.1 ### Mod version 12.2.0 ### Modloader version NeoForge 21.1.218 ### Modpack info https://www.curseforge.com/minecraft/modpacks/caramel-modpack ### [IMPORTANT] If bug: - [ ] I have confirmed this bug is reproducible on a minimal setup, not a modpack with many other mods. ### [IMPORTANT] If bug: The **latest.log** file, not the crash report _No response_ ### Issue description Currently Copper Chains (using the vanilla minecraft namespace, but from the Copper Age Backport mod) aren't able to be "snowlogged". This would probably be easily fixed by adding the #c:chains block tag to the #snowrealmagic:containables tag, which would also support any modded chain tagged correctly. <img width="1920" height="1080" alt="Image" src="https://github.com/user-attachments/assets/99ad288b-40e7-4781-b6a9-efe701819d64" />