ExcalidrawAutomate onFileOpenHook

Readme

https://youtu.be/OX5_UYjXEvc
![Thumbnail - 20231109 Excalidraw on-load script (Custom)](https://github.com/zsviczian/obsidian-excalidraw-plugin/assets/14358394/8d741faf-9ce6-4d83-bb7a-fdc887a30918)

Startup-template

<%*
/* 
```js*/
let watchdog = 0; //watchdog ensures we don't get into an infinite loop in case Excalidraw does not start up
while(!window.ExcalidrawAutomate && watchdog++<50)  await sleep(50);
if(!window.ExcalidrawAutomate) return;
window.ExcalidrawAutomate.onFileOpenHook = (data) => {
  const {ea, excalidrawFile, view} = data; //not needed now, including this just for information.
  app.commands.executeCommandById("obsidian-excalidraw-plugin:Downloaded/Set Grid");
}
console.log("Excalidraw onFileOpenHook is installed");
%>