add camera rig, click-to-move locomotion, and click interaction

Camera: Cinemachine-based rig with an anchor, a state director, point-of-
interest framing, pan input, and dialogue framing volumes.

Player: click-to-move over the NavMesh, a pointer input layer, and a motion
arbiter that reconciles direct stick input with navigation-driven movement.
The pure math is isolated in NightclubArcadia.Locomotion.Math with an EditMode
suite, so the arbitration rules are testable without a scene.

Interaction: IClickInteractable plus a bridge that routes pointer clicks to it.

Supporting project settings: adds the Cinemachine package, the Interactable and
Ground tags the raycasts depend on, and NavMesh agent dimensions matched to the
player capsule (radius 0.3, height 1.8, climb 0.25).

Co-Authored-By: Claude Opus 5 <[email protected]>

NightclubArcadia/Assets/Scripts/Interaction/ClickInteractableBridge.cs

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+using UnityEngine;
+
+namespace NightclubArcadia.Interaction
+{
+    /// <summary>
+    /// Adapts NPCStandIn to the click-to-interact pipeline without modifying
+    /// the existing proximity + keypress path.
+    /// </summary>
+    public sealed class ClickInteractableBridge : MonoBehaviour, IClickInteractable
+    {
+        [SerializeField] NPCStandIn npc;
+
+        public Transform ApproachPoint => transform;
+        public float ApproachRadius => npc != null ? Mathf.Max(0.15f, npc.interactionRange - 0.5f) : 0.15f;
+
+        void Awake()
+        {
+            if (npc == null)
+            {
+                npc = GetComponent<NPCStandIn>();
+            }
+        }
+
+        public void OnApproached()
+        {
+            npc?.Interact();
+        }
+    }
+}

NightclubArcadia/Assets/Scripts/Interaction/ClickInteractableBridge.cs.meta

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+fileFormatVersion: 2
+guid: 5257f07d188de44eb9a04ba4d3a65fec

NightclubArcadia/Assets/Scripts/Interaction/IClickInteractable.cs

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+using UnityEngine;
+
+namespace NightclubArcadia.Interaction
+{
+    public interface IClickInteractable
+    {
+        Transform ApproachPoint { get; }
+        float ApproachRadius { get; }
+        void OnApproached();
+    }
+}

NightclubArcadia/Assets/Scripts/Interaction/IClickInteractable.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 4812c7fb9cf2d41c28966640827dd0c8