Feature/armem virtual robot: Replacement for RobotStateComponent

merge https://gitlab.com/ArmarX/RobotAPI/-/merge_requests/144 first

as the other PRs are not merged yet, the change list is quite large. @fratty only consider the changes to

• armem_robot_state/client/common => VirtualRobotReader and RobotReader
• component: VirtualRobotReaderExampleClient

source/RobotAPI/components/armem/client/VirtualRobotReaderExampleClient/CMakeLists.txt

+armarx_component_set_name("VirtualRobotReaderExampleClient")
+
+find_package(IVT QUIET)
+armarx_build_if(IVT_FOUND "IVT not available")
+
+set(COMPONENT_LIBS
+    ArmarXCore 
+    ArmarXCoreInterfaces  # for DebugObserverInterface
+    ArmarXGuiComponentPlugins
+    RobotAPICore 
+    RobotAPIInterfaces 
+    armem_robot_state
+)
+
+set(SOURCES
+    VirtualRobotReaderExampleClient.cpp
+)
+
+set(HEADERS
+    VirtualRobotReaderExampleClient.h
+)
+
+armarx_add_component("${SOURCES}" "${HEADERS}")
+
+# add unit tests
+# add_subdirectory(test)
+
+#generate the application
+armarx_generate_and_add_component_executable(COMPONENT_NAMESPACE "armarx::robot_state")