Happy Dog Companion

• Added /happydog command that spawns a distorted canine companion for the invoking player (replaces an existing one for that player).
• The dog uses an available dog/wolf/hound model if present, otherwise falls back to the first model asset; it is scaled randomly per spawn for a warped look.
• Behavior: hovers near its owner, teleports back if it drifts too far, faces its movement direction, and subtly wobbles to stay “distorted”.
• Defense: when the owner takes damage, the dog locks onto the attacker, chases, and bites for a small burst of damage with a short cooldown.
• QoL: nameplate/display name set to “Happy Dog”; network/interaction components added so it is visible and interactable in-world.
• Limitations: the AI uses simple position updates (no full pathfinding) and does not track its own health or persistence across sessions beyond the default entity lifecycle.***