Add UI documentation to website

[wborn]

It would be nice to have UI component documentation using Storybook on the website.
There is already a PoC for this.

The remaining work includes:

• Adding documentation for the remaining components
• Add a task to the Gradle build that generates all the UI documentation
• The documentation in the PoC currently uses OpenRemote APIs so it requires a running OpenRemote instance. This may cause older documentation to break when there are API changes.
• The documentation should be made available on the documentation website
• Preferably when new releases are created the UI documentation is automatically added to the documentation website