GH-15: Add pattern preview controller.

[ademarco]

Closes #15

[Shashika6]

Hey @ademarco, Had a look at the PR and the pattern URL works as expected.

Tested callout components with fields. ✅

Tested tooltip component with fields and settings. ✅

Just a small suggestions @ademarco, In the readme if we could mention that we can use settings as well in the json.

Eg:- For tooltip

{ "label": "test", "settings": { "icon": true, "icontheme": "light", "theme": "dark" } }

However I noticed that some components use html how are we going to handle those @ademarco

• I tried using it but it renders as below.

Eg :- Richtext