Merge branch 'add-recipe' into 'master'

Add the "myfiles" recipe

See merge request redox-os/cookbook!312

recipes/other/myfiles/recipe.toml

+[build]
+template = "custom"
+script = """
+mkdir -pv "${COOKBOOK_STAGE}"/home/user
+cp -rv "${COOKBOOK_SOURCE}"/* "${COOKBOOK_STAGE}"/home/user
+"""