userspace: Add basic find utility

This is mostly working but is missing -exec and -ok support. It can
search files though :^)

userspace/programs/find/CMakeLists.txt

@@ -0,0 +1,11 @@
+set(SOURCES
+	main.cpp
+	Node.cpp
+	Token.cpp
+)
+
+add_executable(find ${SOURCES})
+banan_link_library(find ban)
+banan_link_library(find libc)
+
+install(TARGETS find OPTIONAL)