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

gui/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "terrafier-gui"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+description = "Native GUI for Terrafier — interactive world painting with GPU rendering"
+
+[dependencies]
+terrafier-core = { path = "../core" }
+anyhow.workspace = true
+log.workspace = true
+env_logger.workspace = true
+
+egui = "0.31"
+eframe = "0.31"
+rfd = "0.15"