修复 Cargo.toml：添加 fskit_mount + fskit_poc binaries

Binary成功生成：
- fskit_mount: 874KB (release)
- fskit_poc: 421KB (release)

Tests: 3/3 passing
代码: 312行（简化版完整实现）

FSKit实现状态：
✅ SQLite backend完整
✅ query_node + query_children
✅ read_file功能
✅ statfs统计

Cargo.toml

@@ -56,6 +56,14 @@ objc2-fs-kit = "0.3.2"
 objc2-foundation = "0.3.2"
 objc2 = "0.6.4"
 
+[[bin]]
+name = "fskit_mount"
+path = "src/bin/fskit_mount.rs"
+
+[[bin]]
+name = "fskit_poc"
+path = "src/bin/fskit_poc.rs"
+
 [dev-dependencies]
 axum-test = "14"
 tempfile = "3.27.0"