Fix for dev build

Added slots for extensions that add new but don't replace any existing sequences. They are loaded after default animation models.

Naming scheme is following:

$modelname xdreanims/$_CHARACTER_NAME$_add_00$.mdl

There are currently 5 slots available.

--Reverted WiltOS anim load order

- AM4 base support added

None Provided

None Provided

-- Fixed wOS include order. Should be able to replace animations too
-- Minor enhancements

-- wOS support

-- Prone Mod initial support, see description

Initial addon creation.