add jsonforms.css
add jsonforms.css

FelixThieleTUM/JsonFormsEditor,eclipsesource/JsonFormsEditor,pancho111203/JsonFormsEditor,FelixThieleTUM/JsonFormsEditor,FelixThieleTUM/JsonFormsEditor,eclipsesource/JsonFormsEditor,pancho111203/JsonFormsEditor,pancho111203/JsonFormsEditor,FelixThieleTUM/JsonFormsEditor,eclipsesource/JsonFormsEditor,eclipsesource/JsonFormsEditor,pancho111203/JsonFormsEditor