Move cpp files for public API exception code

CMakeLists.txt

@@ -199,7 +199,9 @@ set(LIBLOOT_SRC_API_CPP_FILES
     "${CMAKE_SOURCE_DIR}/src/api/api.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/api_database.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/bsa.cpp"
-    "${CMAKE_SOURCE_DIR}/src/api/error_categories.cpp"
+    "${CMAKE_SOURCE_DIR}/src/api/exception/cyclic_interaction_error.cpp"
+    "${CMAKE_SOURCE_DIR}/src/api/exception/error_categories.cpp"
+    "${CMAKE_SOURCE_DIR}/src/api/exception/undefined_group_error.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/metadata/condition_evaluator.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/metadata/conditional_metadata.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/metadata/file.cpp"
@@ -216,12 +218,10 @@ set(LIBLOOT_SRC_API_CPP_FILES
     "${CMAKE_SOURCE_DIR}/src/api/game/load_order_handler.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/metadata_list.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/plugin.cpp"
-    "${CMAKE_SOURCE_DIR}/src/api/sorting/cyclic_interaction_error.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/sorting/group_sort.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/sorting/plugin_sort.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/sorting/plugin_graph.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/sorting/plugin_sorting_data.cpp"
-    "${CMAKE_SOURCE_DIR}/src/api/sorting/undefined_group_error.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/helpers/crc.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/helpers/logging.cpp"
     "${CMAKE_SOURCE_DIR}/src/api/helpers/text.cpp"