feat: adds tsp project

Author: baywet

additions/.gitignore

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+# MacOS
+.DS_Store
+
+# Default TypeSpec output
+tsp-output/
+dist/
+
+# Dependency directories
+node_modules/

additions/main.tsp

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+import "@microsoft/typespec-msgraph";
+
+using Http;
+@service(#{ title: "Microsoft Graph" })
+namespace Microsoft.Graph;
+
+@entity()
+model OrgContact {
+}