Community Shaders compatibility fix

[jota2rz]

Install the rendering hook after the game's graphics are ready.

• Fixes compatibility issue with Community Shaders where you were not able to see floating texts (Those not rendered through NirnLab UI).
• Fixes edge case scenarios where you could get a black screen after selecting character and loading into the world.
• Potential fix for other mods that hooks into D3D11.

Tested live at Public-2, works fine.

[jota2rz]

Closed in favor of community-shaders/skyrim-community-shaders#2335