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-unix-socket/CMakeLists.txt

@@ -1,16 +1,8 @@
-cmake_minimum_required(VERSION 3.26)
-
-project(test-unix-socket CXX)
-
 set(SOURCES
 	main.cpp
 )
 
 add_executable(test-unix-socket ${SOURCES})
-target_compile_options(test-unix-socket PUBLIC -O2 -g)
-target_link_libraries(test-unix-socket PUBLIC libc)
+banan_link_library(test-unix-socket libc)
 
-add_custom_target(test-unix-socket-install
-	COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/test-unix-socket ${BANAN_BIN}/
-	DEPENDS test-unix-socket
-)
+install(TARGETS test-unix-socket)