BuildSystem: Rework the whole cmake build system

Now files are installed using the install() command instead of manually
copying files to their destinations. This allows automatic recompilation
of headers that did not work previously

userspace/test-window/CMakeLists.txt

@@ -1,16 +1,11 @@
-cmake_minimum_required(VERSION 3.26)
-
-project(test-window CXX)
-
 set(SOURCES
 	main.cpp
 )
 
 add_executable(test-window ${SOURCES})
-target_compile_options(test-window PUBLIC -O2 -g)
-target_link_libraries(test-window PUBLIC libc ban libgui)
+banan_include_headers(test-window ban)
+banan_include_headers(test-window libinput)
+banan_link_library(test-window libc)
+banan_link_library(test-window libgui)
 
-add_custom_target(test-window-install
-	COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/test-window ${BANAN_BIN}/
-	DEPENDS test-window
-)
+install(TARGETS test-window)