Add data and Sandcastle for KHR_materials_anisotropy

Apps/SampleData/models/AnisotropyStrengthTest/LICENSE.md

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+# LICENSE file for the model: Anisotropy Strength Test
+
+All files in this directory tree are licensed as indicated below.
+
+- All files directly associated with the model including all text, image and binary files:
+
+  - [CC0 1.0 Universal]("https://creativecommons.org/publicdomain/zero/1.0/legalcode") [SPDX license identifier: "CC0-1.0"]
+
+- This file and all other metadocumentation files including "metadata.json":
+
+  - [Creative Commons Attribtution 4.0 International]("https://creativecommons.org/licenses/by/4.0/legalcode") [SPDX license identifier: "CC-BY-4.0"]
+
+Full license text of these licenses are available at the links above
+
+#### Generated by modelmetadata

Apps/SampleData/models/AnisotropyStrengthTest/README.md

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+# Anisotropy Strength Test
+
+## Tags
+
+[extension](../../Models-extension.md), [testing](../../Models-testing.md)
+
+## Extensions Used
+
+- KHR_materials_anisotropy
+
+## Summary
+
+This model tests the strength parameter for KHR_materials_anisotropy.
+
+## Operations
+
+- [Display](https://github.khronos.org/glTF-Sample-Viewer-Release/?model=https://raw.GithubUserContent.com/KhronosGroup/glTF-Sample-Assets/main/./Models/AnisotropyStrengthTest/glTF-Binary/AnisotropyStrengthTest.glb) in SampleViewer
+- [Download GLB](https://raw.GithubUserContent.com/KhronosGroup/glTF-Sample-Assets/main/./Models/AnisotropyStrengthTest/glTF-Binary/AnisotropyStrengthTest.glb)
+- [Model Directory](./)
+
+## Screenshot
+
+![screenshot](screenshot/screenshot-large.png)
+
+## Description
+
+This model tests the strength parameter for [`KHR_materials_anisotropy`](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_anisotropy).
+
+A grid of spheres compares material roughness (horizontally) to anisotropy strength (vertically).
+
+Note the `KHR_materials_anisotropy` specification provides formulas to clearly define how anisotropy strength interacts with material roughness. The effects should be most apparent in the column with zero material roughness, and anisotropy should not offer any effect when material roughness is 1.0.
+
+## Legal
+
+© 2023, Public. [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/legalcode)
+
+- Ed Mackey for Everything
+
+### Assembled by modelmetadata

Apps/SampleData/models/AnisotropyStrengthTest/metadata.json

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+{
+    "version": 2,
+    "legal": [
+        {
+            "year": "2023",
+            "owner": "Public",
+            "license": "Public Domain / CC0",
+            "artist": "Ed Mackey",
+            "what": "Everything",
+            "licenseUrl": "https://creativecommons.org/publicdomain/zero/1.0/legalcode",
+            "text": "CC0 1.0 Universal",
+            "spdx": "CC0-1.0",
+            "icon": "https://licensebuttons.net/p/zero/1.0/88x31.png"
+        }
+    ],
+    "tags": [
+        "extension",
+        "testing"
+    ],
+    "screenshot": "screenshot/screenshot.png",
+    "name": "Anisotropy Strength Test",
+    "path": "./Models/AnisotropyStrengthTest",
+    "summary": "This model tests the strength parameter for KHR_materials_anisotropy.",
+    "createReadme": true
+}