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/model/terrain.rs

@@ -0,0 +1,26 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+pub enum Terrain {
+    Desert,
+    Grass,
+    Forest,
+    Rock,
+    Sand,
+    Swamp,
+    Water,
+}
+
+impl Terrain {
+    pub fn name(&self) -> &'static str {
+        match self {
+            Terrain::Desert => "Desert",
+            Terrain::Grass => "Grass",
+            Terrain::Forest => "Forest",
+            Terrain::Rock => "Rock",
+            Terrain::Sand => "Sand",
+            Terrain::Swamp => "Swamp",
+            Terrain::Water => "Water",
+        }
+    }
+}