Add dtrpg-sdk.swift (#14461)

Co-authored-by: GitHub <noreply@github.com>

Author: github-actions[bot]

packages.json

@@ -7646,6 +7646,7 @@
   "https://github.com/pietropizzi/GridStack.git",
   "https://github.com/pikachu987/NotificationView.git",
   "https://github.com/pikoshyk/belarusianlacinka.git",
+  "https://github.com/pilgrimagesoftware/dtrpg-sdk.swift.git",
   "https://github.com/PimCoumans/AnimationPlanner.git",
   "https://github.com/PimCoumans/ConstraintBuilder.git",
   "https://github.com/PimCoumans/DidUpdate.git",