Added a DocC catalog coverage check.

.env

@@ -15,6 +15,7 @@
 # --- DOCUMENTATION ---
 
 DOCC_ARCHIVE_OUTPUT=./${SPM_LIBRARY_TARGET}.doccarchive
+DOCC_CATALOG=Sources/$(SPM_LIBRARY_TARGET)/Catalogs/$(SPM_LIBRARY_TARGET).docc
 DOCC_GITHUB_OUTPUT=./docs
 DOCC_GITHUB_BASE_PATH=asconnect-service
 DOCC_PREVIEW_URL=http://localhost:8080/documentation/asconnectservice