Todo: refactor rendering to avoid using direct GL calls, instead I've
read that you could use a `BufferBuilder` but need to do more looking
into that.
Also need to update some block entity things, since some calls are also
gone.
* Use toolchains as proposed by SquidDev-CC
* Removed jcenter() repo (where bad mercury dep was coming from)
Co-authored-by: ToadDev <748280+Toad-Dev@users.noreply.github.com>