Create Archer replacement

[jChicote]

Description

New archer enemies will exist with their own mono behaviour

Acceptance Criteria

• Behaves 'similarly' to previous archer but improved
• Uses existing character models and assets
• Uses the Navmesh for navigation

Implementation

[jChicote]

##Scope Change:

Animations:

• Cleaned up imports and added new animations to compliment the existing set of animations
• Modified existing archer animations to bake against the model's feet along the y-axis
• Implemented Rig layers for the weapon, body, arms and head along with the appropriate constraints for their IK
• Implemented AimTarget under the character model paired with an IK target assigner pointing to the player
• Implemented RigLayerControl logic to animate weights based on the relative direction along the x-y plane
• Added an AnimationRigControl so that all RigLayers can be commanded

Behaviour

• Attack logic, movement logic are moved into states controlled through Behaviour Tree Nodes
• Added ArcherWeaponSystem

[jChicote]

Problem:

IK Targetting:

• The use of an arc occluder may not be viable for reliable IK control of main rig weights as they are dependent on the view direction of the hip reference point is to the player.

[jChicote]

Solution

• Instead of using a single transform reference change it to interpolate between 2 based on implied direction from the animations

[jChicote]

Fixes needed

• Arm detection is too wide it needs to be more narrow
• Additional ragdoll joints need to be added for the foot and chest joints need to be refined