feat: add linear chunk format.

pumpkin-config/src/chunk.rs

@@ -6,6 +6,7 @@ use serde::{Deserialize, Serialize};
 #[serde(default)]
 pub struct ChunkConfig {
     pub compression: ChunkCompression,
+    pub file_format: ChunkFormat,
 }
 
 #[derive(Deserialize, Serialize)]
@@ -35,3 +36,11 @@ pub enum Compression {
     /// Custom compression algorithm (since 24w05a)
     Custom,
 }
+
+#[derive(Deserialize, Serialize, Clone, Default)]
+#[repr(u8)]
+pub enum ChunkFormat {
+    #[default]
+    Anvil,
+    Linear,
+}

pumpkin-world/Cargo.toml

@@ -28,6 +28,8 @@ num-traits = "0.2"
 # Compression   
 flate2 = "1.0"
 lz4 = "1.28.1"
+zstd = "0.13.2"
+
 
 file-guard = "0.2.0"
 indexmap = "2.7.1"

pumpkin-world/src/chunk/anvil.rs

@@ -526,8 +526,8 @@ mod tests {
     fn test_writing() {
         let generator = get_world_gen(Seed(0));
         let level_folder = LevelFolder {
-            root_folder: PathBuf::from("./tmp"),
-            region_folder: PathBuf::from("./tmp/region"),
+            root_folder: PathBuf::from("./tmp_Anvil"),
+            region_folder: PathBuf::from("./tmp_Anvil/region"),
         };
         if fs::exists(&level_folder.root_folder).unwrap() {
             fs::remove_dir_all(&level_folder.root_folder).expect("Could not delete directory");