- Added Primaris weapon models from Joazz

Switched a few model's directories so that other addons would be able to provide them as an alternate place for them.
- Added new powerfist models

Added librarian staff
Fixed minor material issue I found

Changed thumbnail. AI image wasn't vibing

Sanity check to make sure the necessary textures got updated

Think I found all the missing textures and added them

Transferred Neil Roberts Bolter over and added shield

Changed Thumbnail