Add OpenCL support to the container

### Enhancement Type

A completely new feature

### Describe the enhancement

With the [C2ME](https://modrinth.com/mod/c2me-fabric) mod there' s a beta that enables GPU support with OpenCL. It can be found on their [Discord server](https://discord.relativitymc.org/). You can't run the mod without OpenCL installed or it will crash.

This mod vastly improves chunk generation and therefore the experience of Minecraft. I would consider adding OpenCL to the Docker container once C2ME's GPU support gets officially released on Modrinth.

Start by checking the container build configuration and dependency-installation entry points to determine how OpenCL would be added. Confirm that C2ME's OpenCL support is officially released, then verify the required container dependency and its effect on running the mod.

Written by the indexing model from the issue text.