Tidy of components

- Moved all components into a single directory like nextjs
 - Made component names consistent with each other
 - Made component names consistent with their export class names
 - Added storybook for a few components with the aim to extend this further.

src/util/format.js

@@ -0,0 +1,3 @@
+export function formatLayerId (id) {
+  return id === "" ? "[empty_string]" : `'${id}'`;
+}