Include new assets in the v3.4.0 release

[TheDuckCow]

The following are the new mobs being added as part of this release. This issue is created for the purpose of mentioning in release notes as part of the milestone; for new rig contributions continue to post to: #245

• Warden mob by DigDanAnimates (twitter), split into three versions for backwards compatibility (see here for more info, use blender 3.0+ for best results)
• Allay mob by zNightlord (twitter), QA pending
• Frog mob by zNightlord (twitter), slight modifications made for backwards compatibility
• Cat model by TRPHB Animation (YouTube), QA pending
• Spyglass entity by Banana-Blu, QA checked.

[TheDuckCow]

QC here and edits finally done. Had to make a number of changes:

• Made backward ports for the Warden and Cat and allay (via fbx reimported into blender 2.79 for very basic versions of the rig)
• Had to fix scale on the cat & Warden, scale applied may have messed up some proportions of bone meshes, I did some quick fixing where most needed.
• The warden will appear to have wrong materials if prep materials is used on it, hence this issue will be critical to be working before launch