chore: remove test SolidWorks files from repository

Remove TestDocs/ directory and add to .gitignore. Test files can be maintained locally without bloating the repository history.

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Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -242,3 +242,6 @@ ModelManifest.xml
 .fake/
 
 .pfx
+
+# Test documents
+TestDocs/