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/index.js

@@ -0,0 +1,8 @@
+import Button from './Button';
+import ButtonGroup from './ButtonGroup';
+import Icon from './Icon';
+import IconButton from './IconButton';
+import ThemeWrapper from './ThemeWrapper/';
+import Typography from './Typography';
+
+export { Button, ButtonGroup, Icon, IconButton, ThemeWrapper, Typography };