feat(debug): 支持网易 Minecraft 调试启动

新增 debug 子命令，自动准备开发世界、注册内置调试 MOD，并将项目行为包和资源包链接到网易运行目录，方便启动游戏后直接进入调试世界。

调试 MOD 资源随仓库一起嵌入，避免依赖本机绝对路径；Windows junction 写入剥离 verbatim 前缀后的 DOS 路径，保证 Minecraft 能正确读取链接包。

build.rs

@@ -6,10 +6,21 @@ use std::{
 
 const EMPTY_DIRS_FILE: &str = ".empty-dirs";
 
+const DEBUG_MOD_ROOT: &str = "debug_mod";
+
 fn main() {
     println!("cargo:rerun-if-changed=examples");
+    println!("cargo:rerun-if-changed={}", DEBUG_MOD_ROOT);
 
     let examples_root = PathBuf::from("examples");
+    let debug_mod_root = PathBuf::from(DEBUG_MOD_ROOT);
+    if !debug_mod_root.is_dir() {
+        panic!(
+            "required debug MOD resource directory was not found: {}",
+            DEBUG_MOD_ROOT
+        );
+    }
+
     let out_dir = PathBuf::from(env::var("OUT_DIR").expect("OUT_DIR is not set"));
     let out_file = out_dir.join("embedded_examples.rs");
 
@@ -17,6 +28,8 @@ fn main() {
     let mut files = Vec::new();
     let mut empty_dirs_by_example = BTreeMap::new();
 
+    let mut debug_mod_files = Vec::new();
+
     if examples_root.is_dir() {
         collect_examples(
             &examples_root,
@@ -27,6 +40,8 @@ fn main() {
         )
         .expect("failed to collect example templates");
     }
+    collect_files(&debug_mod_root, &debug_mod_root, &mut debug_mod_files)
+        .expect("failed to collect debug MOD resources");
 
     dirs.sort();
     dirs.dedup();
@@ -35,6 +50,7 @@ fn main() {
         empty_dirs.sort();
         empty_dirs.dedup();
     }
+    debug_mod_files.sort_by(|a, b| a.0.cmp(&b.0));
 
     let mut generated = String::new();
     generated.push_str(
@@ -45,7 +61,8 @@ fn main() {
         generated.push_str(&format!("    {:?},\n", dir));
     }
     generated.push_str("];\n\n");
-    generated.push_str("#[allow(dead_code)]\nstatic EMBEDDED_EXAMPLE_FILES: &[EmbeddedFile] = &[\n");
+    generated
+        .push_str("#[allow(dead_code)]\nstatic EMBEDDED_EXAMPLE_FILES: &[EmbeddedFile] = &[\n");
     for (relative_path, absolute_path) in &files {
         generated.push_str(&format!(
             "    EmbeddedFile {{ path: {:?}, contents: include_bytes!(r#\"{}\"#) }},\n",
@@ -70,9 +87,39 @@ fn main() {
         }
         generated.push_str("    ] },\n");
     }
+    generated.push_str("];\n\n");
+
+    generated
+        .push_str("#[allow(dead_code)]\nstatic EMBEDDED_DEBUG_MOD_FILES: &[EmbeddedFile] = &[\n");
+    for (relative_path, absolute_path) in &debug_mod_files {
+        generated.push_str(&format!(
+            "    EmbeddedFile {{ path: {:?}, contents: include_bytes!(r#\"{}\"#) }},\n",
+            relative_path,
+            absolute_path.display()
+        ));
+    }
     generated.push_str("];\n");
 
-    fs::write(out_file, generated).expect("failed to write embedded example list");
+    fs::write(out_file, generated).expect("failed to write embedded resource list");
+}
+
+fn collect_files(root: &Path, dir: &Path, files: &mut Vec<(String, PathBuf)>) -> io::Result<()> {
+    for entry in fs::read_dir(dir)? {
+        let entry = entry?;
+        let path = entry.path();
+        if path.is_dir() {
+            collect_files(root, &path, files)?;
+        } else if path.is_file() {
+            let relative_path = path
+                .strip_prefix(root)
+                .expect("embedded resource path is outside root")
+                .to_string_lossy()
+                .replace('\\', "/");
+            files.push((relative_path, path.canonicalize()?));
+        }
+    }
+
+    Ok(())
 }
 
 fn collect_examples(