BuildSystem: Move all userpace libraries under the userspace directory

As the number of libraries is increasing, root directory starts to
expand. This adds better organization for libraries

userspace/libraries/LibGUI/CMakeLists.txt

@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(libgui CXX)
+
+set(LIBGUI_SOURCES
+	Window.cpp
+)
+
+add_custom_target(libgui-headers
+	COMMAND ${CMAKE_COMMAND} -E copy_directory_if_different ${CMAKE_CURRENT_SOURCE_DIR}/include/ ${BANAN_INCLUDE}/
+	DEPENDS sysroot
+)
+
+add_library(libgui ${LIBGUI_SOURCES})
+add_dependencies(libgui headers libc-install)
+target_link_libraries(libgui PUBLIC libc libfont)
+
+add_custom_target(libgui-install
+	COMMAND ${CMAKE_COMMAND} -E copy_if_different ${CMAKE_CURRENT_BINARY_DIR}/libgui.a ${BANAN_LIB}/
+	DEPENDS libgui
+	BYPRODUCTS ${BANAN_LIB}/libgui.a
+)
+
+set(CMAKE_STATIC_LIBRARY_PREFIX "")