feat: Icon component (#1499)

* New icons and old strucure of OHIF ui v1

* Export icon

* Removing wrong import and fixing some exports

* Fixing svg loader and svg images to fullCurrent

* Small fixes on docz

* Remove repeated icon

* Update other components to use Icon

* Update platform/ui/src/components/Icon/icon.mdx

Co-Authored-By: Rodrigo Antinarelli <rodrigoantinarelli@gmail.com>

* Fixing callouts

* Move icons to assets and fixing layout on iconButtons

* Fix path of icons

Co-authored-by: Danny Brown <danny.ri.brown@gmail.com>
Co-authored-by: Rodrigo Antinarelli <rodrigoantinarelli@gmail.com>

platform/ui/src/components/Icon/index.js

@@ -0,0 +1,2 @@
+import Icon from './Icon';
+export default Icon;