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/CMakeLists.txt

@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(libraries CXX)
+
+set(USERSPACE_LIBRARIES
+	LibC
+	LibELF
+	LibFont
+	LibGUI
+	LibImage
+	LibInput
+)
+
+foreach(LIBRARY ${USERSPACE_LIBRARIES})
+	add_subdirectory(${LIBRARY})
+endforeach()
+
+add_custom_target(libraries)
+add_custom_target(libraries-headers)
+add_custom_target(libraries-install)
+
+foreach(LIBRARY ${USERSPACE_LIBRARIES})
+	string(TOLOWER ${LIBRARY} LIBRARY_LOWER)
+
+	if (TARGET ${LIBRARY_LOWER})
+		add_dependencies(libraries ${LIBRARY_LOWER})
+		# This is to allow cmake to link when libc updates
+		target_link_options(${LIBRARY_LOWER} PRIVATE -nolibc)
+	endif()
+
+	add_dependencies(libraries-headers ${LIBRARY_LOWER}-headers)
+	add_dependencies(libraries-install ${LIBRARY_LOWER}-install)
+endforeach()