Add SphereColliderPair

SphereColliderPair.md

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+# SphereColliderPair 
+Component: GameObject
+
+
+
+| The component creates a Sphere Collider Pair, much like the  [ClothSphereColliderPair](https://docs.unity3d.com/6000.0/Documentation/ScriptReference/Cloth-sphereColliders.html/ClothSphereColliderPair). We use this as a simple way to retrieve information from the two Sphere Colliders in one call and send the information to the GPU. | ![https://i.imgur.com/oHwPDE4.png](https://i.imgur.com/oHwPDE4.png) |
+| -------- | -------- |
+
+## SphereA 
+SphereCollider: Default None.
++ The First Sphere Collider in the pair.
+
+## SphereB
+SphereCollider: Default None.
++ The second Sphere Collider in the pair.
+
+## Friction
+Float: Min 0, Max 1, Default 0.8.
++ Low Friction (e.g., 0.1): The cloth will slide more easily over the surface. It will maintain more of its velocity when colliding with the collider.
++ High Friction (e.g., 0.9): The cloth will "stick" more to the surface. It will lose more of its velocity when colliding with the collider.
++ High Friction (e.g., 1.0): The cloth will behave as if it's "stuck" to the surface, maintaining its position relative to the collider.
+
+## Gizmo Color
+Color: Default Green.
++ Changes the color of the outliner for the SphereColliderPair Collider.
+
+------
+
+# API
+## GetCollidableSpherePairStruct()
+Returns the following Struct:
+```csharp
+public struct CollidableSpherePairStruct {
+    public Vector3 centerA;
+    public float radiusA;
+    public Vector3 centerB;
+    public float radiusB;
+    public float friction;
+}
+```