Initial commit: Terrafier v0.1.0

- Core world model (World, Dimension, Tile, Terrain, Platform)
- NBT reader/writer with full tag support
- Anvil region (.mca) format reader with chunk parsing
- Block palette compression and export
- Biome database with Minecraft 1.21 biomes
- CLI commands: new, import, export, info, render
- GUI application with egui (viewport, tools, undo/redo)
- Noise-based heightmap generation and editing operations

License: GPL-3.0-or-later

core/src/lib.rs

@@ -0,0 +1,20 @@
+//! Terrafier Core — world model, I/O, operations.
+//!
+//! The core library provides the data model (World, Dimension, Tile, Terrain),
+//! Minecraft save import/export, editing operations, and height map generation.
+
+pub mod coords;
+pub mod io;
+pub mod model;
+pub mod ops;
+pub mod plugins;
+
+// Re-export key types for convenience
+pub use coords::{BlockCoords, ChunkCoords, RegionCoords, TileCoords};
+pub use io::export;
+pub use io::import;
+pub use model::dimension::Dimension;
+pub use model::platform::Platform;
+pub use model::terrain::Terrain;
+pub use model::tile::Tile;
+pub use model::world::World;