added server

cmake/stage_server.cmake

@@ -0,0 +1,40 @@
+# Stage server/ next to the Host GUI, preserving an existing local config.
+if(NOT EXISTS "${CO_SERVER_SOURCE_DIR}")
+    message(FATAL_ERROR "Server source directory not found: ${CO_SERVER_SOURCE_DIR}")
+endif()
+
+if(NOT EXISTS "${CO_SERVER_SOURCE_DIR}/consumer_server_cli.py")
+    message(FATAL_ERROR
+        "Server entrypoint not found: ${CO_SERVER_SOURCE_DIR}/consumer_server_cli.py")
+endif()
+
+set(_preserve_config "")
+if(EXISTS "${CO_SERVER_STAGE_CONFIG}")
+    file(READ "${CO_SERVER_STAGE_CONFIG}" _preserve_config)
+endif()
+
+file(REMOVE_RECURSE "${CO_SERVER_STAGE_DIR}")
+file(MAKE_DIRECTORY "${CO_SERVER_STAGE_DIR}")
+
+# Prefer a filtered copy so Python caches do not ship with the build.
+file(GLOB _server_entries RELATIVE "${CO_SERVER_SOURCE_DIR}" "${CO_SERVER_SOURCE_DIR}/*")
+foreach(_entry IN LISTS _server_entries)
+    if(_entry STREQUAL "__pycache__" OR _entry STREQUAL ".pytest_cache")
+        continue()
+    endif()
+    file(COPY "${CO_SERVER_SOURCE_DIR}/${_entry}"
+        DESTINATION "${CO_SERVER_STAGE_DIR}"
+        PATTERN "__pycache__" EXCLUDE
+        PATTERN "*.pyc" EXCLUDE
+        PATTERN ".pytest_cache" EXCLUDE
+    )
+endforeach()
+
+if(NOT "${_preserve_config}" STREQUAL "")
+    file(WRITE "${CO_SERVER_STAGE_CONFIG}" "${_preserve_config}")
+endif()
+
+if(NOT EXISTS "${CO_SERVER_STAGE_DIR}/consumer_server_cli.py")
+    message(FATAL_ERROR
+        "Failed to stage server entrypoint to ${CO_SERVER_STAGE_DIR}/consumer_server_cli.py")
+endif()