The "Beyond20*" events of the DOM API appear to not be triggered on DnD Beyond itself

[carrierfry]

Describe the bug The Beyond20* events (like Beyond20_Loaded(settings)) do not get triggered when on DnD Beyond

To Reproduce Steps to reproduce the behavior:

1. Create extension or userscript for DnD Beyond character sheet with following code and enable/load it:

   
   function addBeyond20EventListener(name, callback) {
   const event = ["Beyond20_" + name, (evt) => {
       const detail = evt.detail || [];
       callback(...detail)
   }, false];
   document.addEventListener(...event);
   return event;
   }

addBeyond20EventListener("Loaded", settings => { console.log("Beyond20_Loaded"); console.log(settings); });

console.log("Added event listener");

2. Open character sheet on DnD Beyond
3. Open DevTools
4. See missing console logs

**Expected behavior**
The `Beyond20*` events should work even on DnD Beyond itself to make 3rd party extensions be able to listen to those events there

**Screenshots**
![image](https://github.com/kakaroto/Beyond20/assets/20256939/271a6098-8c77-4054-895f-933abb69793c)

**Browser Info (please complete the following information):**
 - Browser Google Chrome
 - Version 125.0.6422.141