feat(package): Add placeholders

Author: bmuenzenmeyer

source/images/README.md

@@ -0,0 +1,5 @@
+This is the default location to place global image files.
+
+The entire contents of this directory will be recursively copied to your configured `public/` directory.
+
+If you wish to rename this directory, make sure you update the `paths.source.images` property within `patternlab-config.json`.

source/js/README.md

@@ -0,0 +1,5 @@
+This is the default location to place global javascript files.
+
+The entire contents of this directory will be recursively copied to your configured `public/` directory.
+
+If you wish to rename this directory, make sure you update the `paths.source.js` property within `patternlab-config.json`.