Userspace: Implement basic image rendering for Netbpm

You can now render Netbpm (P6) format image to framebuffer using
`image` command. I added basic test image to
/usr/share/images/sample.ppm

userspace/image/CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(image CXX)
+
+set(SOURCES
+	main.cpp
+	Image.cpp
+	Netbpm.cpp
+)
+
+add_executable(image ${SOURCES})
+target_compile_options(image PUBLIC -O2 -g)
+target_link_libraries(image PUBLIC libc ban)
+
+add_custom_target(image-install
+	COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/image ${BANAN_BIN}/
+	DEPENDS image
+)