feat(io): add read_file/write_file commands and dialog capability

src-tauri/capabilities/default.json

@@ -5,6 +5,7 @@
   "windows": ["main"],
   "permissions": [
     "core:default",
-    "opener:default"
+    "opener:default",
+    "dialog:default"
   ]
 }

src-tauri/src/lib.rs

@@ -1,10 +1,16 @@
 mod pdf;
+mod project;
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
-        .invoke_handler(tauri::generate_handler![pdf::compile_pdf])
+        .plugin(tauri_plugin_dialog::init())
+        .invoke_handler(tauri::generate_handler![
+            pdf::compile_pdf,
+            project::read_file,
+            project::write_file
+        ])
         .run(tauri::generate_context!())
         .expect("error while running margin");
 }

src-tauri/src/project.rs

@@ -0,0 +1,11 @@
+use std::fs;
+
+#[tauri::command]
+pub fn read_file(path: String) -> Result<String, String> {
+    fs::read_to_string(&path).map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+pub fn write_file(path: String, contents: String) -> Result<(), String> {
+    fs::write(&path, contents).map_err(|e| e.to_string())
+}