Adding test on file manipulation from cli

src/main/java/cli/Action.java

src/main/java/ui/MainGUI.java

src/main/resources/ui/util/starting_logo.png

src/main/resources/ui/util/starting_logo.xcf

...esources/ui/util/telecomparis_endossem_ipp_rvb_150pix.png

ttool-cli/src/main/java/TToolCLI.java

ttool/src/main/java/Main.java

ttool/src/test/java/cli/CLIModelTest.java

ttool/src/test/resources/cli/input/scriptmodel