separate unittest folder

unittests/CMakeLists.txt

@@ -0,0 +1,29 @@
+target_sources(${FSFW_TEST_TGT} PRIVATE
+    CatchDefinitions.cpp
+    CatchFactory.cpp
+    printChar.cpp
+    testVersion.cpp
+)
+
+target_sources(${FSFW_TEST_TGT} PRIVATE
+    CatchRunner.cpp
+    CatchSetup.cpp
+)
+
+add_subdirectory(testcfg)
+add_subdirectory(mocks)
+
+add_subdirectory(action)
+add_subdirectory(power)
+add_subdirectory(container)
+add_subdirectory(osal)
+add_subdirectory(serialize)
+add_subdirectory(datapoollocal)
+add_subdirectory(storagemanager)
+add_subdirectory(globalfunctions)
+add_subdirectory(timemanager)
+add_subdirectory(tmtcpacket)
+add_subdirectory(cfdp)
+add_subdirectory(hal)
+add_subdirectory(internalerror)
+add_subdirectory(devicehandler)