userspace: Implement simple sort utility

This supports most(?) options except for the separate fields. Should
work for simple use cases

Also merge is currently just a wrapper around sort so its not optimized
:D

userspace/programs/sort/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(sort ${SOURCES})
+banan_link_library(sort ban)
+banan_link_library(sort libc)
+
+install(TARGETS sort OPTIONAL)