extract loadRecipes into ConfigLoaderRecipes.cpp

Continues the ConfigLoader.cpp domain split. parseRecipeOutputs is only
used by loadRecipes, so it moves along as a domain-local anonymous-
namespace helper rather than into TomlHelpers. Pure move; no logic
change.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YHcUerKAZKWNvSKJxYKbnG

src/lib/config/CMakeLists.txt

@@ -23,6 +23,7 @@ SET(SRCS
     ${CMAKE_CURRENT_SOURCE_DIR}/ConfigLoader.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/ConfigLoaderWorld.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/ConfigLoaderBuildings.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/ConfigLoaderRecipes.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/SurfaceMask.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/BlueprintSerializer.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/ShipLayoutBlueprintSerializer.cpp