feat(plugins): inject API on window.__TAURI__ (#383)

plugins/upload/src/lib.rs

@@ -115,6 +115,7 @@ fn file_to_body<R: Runtime>(channel: Channel<R>, file: File) -> reqwest::Body {
 
 pub fn init<R: Runtime>() -> TauriPlugin<R> {
     PluginBuilder::new("upload")
+        .js_init_script(include_str!("api-iife.js").to_string())
         .invoke_handler(tauri::generate_handler![download, upload])
         .build()
 }