Release v1.5.0 - Skin Width

Added skin width feature to the project.

Might take a break for a bit given the announcement of Unity's new Unity plan pricing and packaging updates from September 12th.

[1.5.0] 2024-09-14

• Added basic navmesh example for using OpenKCC movement engine with a navmesh
  agent to simulate basic path finding.
• Added basic buttons and controls for look, jump, and move actions for
  the character controller that can be enabled manually and are automatically
  loaded when the game is opened from a mobile device in a web browser.
• Fixed small bug in KCCStateMachine causing player to stop jumping
  when they are walking up steps or slopes.
• Added SkinWidth parameter to IKCCConfig and KCCMovementEngine to allow
  for a buffer space around the character when computing movement to avoid
  numerical precision errors for physics system.
• Modified extensions of AbstractPrimitiveColliderCast to store their
  collider parameters in the collider cast component itself and copy
  those parameters to the collider. Although if this has not been
  configured yet, it will search for an existing collider.
• Re-implemented example KCCMovementEngineWithPush to show how to use
  ICharacterPush to push objects with the KCCMovementEngine