[Request] Add debugging limitations

[stefnotch]

https://docs.flaxengine.com/manual/scripting/debugging/index.html explains how one debugs their scripts.

It should also include a note regarding debugging engine code. Something along the lines of "if you want to debug FlaxEngine code, you will need...".

[stefnotch]

I opened this request, since someone on Discord just asked

I have all the requirements installed
Debugging game scripts works just fine I can hit all the break points but engine code break points display an alert with "missing symbol error message"
Since I'm planning to extend some aspect of the engine and the editor I want to be able to debug Editor and engine code