feat: implement IconButton component and update SSOLogin to use it

src/components/icon-button.tsx

@@ -0,0 +1,20 @@
+import { Button } from '@/components/ui/button';
+
+import { IconProp } from '@fortawesome/fontawesome-svg-core';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+
+export function IconButton({
+  icon,
+  children,
+  ...props
+}: {
+  icon: IconProp;
+  children: React.ReactNode;
+} & React.ComponentProps<typeof Button>) {
+  return (
+    <Button type='button' variant='default' {...props}>
+      <FontAwesomeIcon icon={icon} className='mr-2' />
+      {children}
+    </Button>
+  );
+}