Garden Stuff

- Added metal lattice building blocks in iron, rust, black oxide, and moss variants.

- Added wood lattice building blocks in standard vanilla plank variants.

- Added rust, black oxide, and moss variants to heavy chain and light chain blocks.

- Added PlantMegaPack integration.

- Updated static rendering code, but lighting still behaves oddly in some places.

For all metal decorative blocks, variants can be obtained as follows:

- Rust version is obtained by dunking the iron version in a filled cauldron.

- Black Oxide version is obtained by baking the iron version in a furnace.

- Moss version is obtained by crafting vines surrounded by the iron version.