feat(io): add write_bytes command for binary exports

src-tauri/src/lib.rs

@@ -9,7 +9,8 @@ pub fn run() {
         .invoke_handler(tauri::generate_handler![
             pdf::compile_pdf,
             project::read_file,
-            project::write_file
+            project::write_file,
+            project::write_bytes
         ])
         .run(tauri::generate_context!())
         .expect("error while running margin");

src-tauri/src/project.rs

@@ -1,3 +1,5 @@
+use base64::Engine;
+use base64::engine::general_purpose::STANDARD;
 use std::fs;
 
 #[tauri::command]
@@ -9,3 +11,9 @@ pub fn read_file(path: String) -> Result<String, String> {
 pub fn write_file(path: String, contents: String) -> Result<(), String> {
     fs::write(&path, contents).map_err(|e| e.to_string())
 }
+
+#[tauri::command]
+pub fn write_bytes(path: String, data: String) -> Result<(), String> {
+    let bytes = STANDARD.decode(data.as_bytes()).map_err(|e| e.to_string())?;
+    fs::write(&path, bytes).map_err(|e| e.to_string())
+}