Adds classes for optics:
- AttachmentOpticsRIS
- AttachmentCarryHandleMount
For attachements
- AttachmentShortRIS
- AttachmentRISUnderBarrel
For muzzles
- AttachmentMuzzle9_18
- AttachmentMuzzle9_19
- AttachmentMuzzle45
- AttachmentMuzzle556
- AttachmentMuzzle545
- AttachmentMuzzle762_54
- AttachmentMuzzle762_51
- AttachmentMuzzle762_39
- AttachmentMuzzle308
Both weapon mods and attachments mods can use those make optics and other parts shareable between weapons.
- ver 0.0.1 - initial version
- ver 0.0.2 - fix AttachmentTypes visibility in properties
- ver 0.0.3 - added carry handle and muzzle attachment types
- ver 0.0.4 - added more muzzle attachments and underbarrel RIS rail
