Add Traitors challenge

Author: ywgATustcbbs

.gitignore

@@ -55,3 +55,7 @@ src/.vs
 src/sourcelink.json
 src/utils/*/Debug/
 src/utils/*/Release/
+/.vs/reactivedrop_public_src/CopilotIndices/17.13.433.20974
+/.vs/reactivedrop_public_src/FileContentIndex
+/.vs/reactivedrop_public_src/v17
+/.vs