feat: 添加前后端交互的示例代码

src-tauri/src/services/file.rs

@@ -0,0 +1,15 @@
+use memmap::*;
+
+// TODO: 打开文件，并将文件映射到内存
+pub fn mmap_mut_file(file_path: &str) -> Result<MmapMut, std::io::Error> {
+    let file = std::fs::OpenOptions::new()
+        .read(true)
+        .write(true)
+        .open(file_path)?;
+
+    unsafe {
+        MmapOptions::new()
+            .map_mut(&file)
+            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e.to_string()))
+    }
+}