New Brand Options!

- Added TikTok
- Added generic email icon
- Added alternative email icon
- Added default button to brands.css for your own branding

icons/email_alt.svg

@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M12 0C5.376 0 0 5.376 0 12C0 18.624 5.376 24 12 24H18V21.6H12C6.792 21.6 2.4 17.208 2.4 12C2.4 6.792 6.792 2.4 12 2.4C17.208 2.4 21.6 6.792 21.6 12V13.716C21.6 14.664 20.748 15.6 19.8 15.6C18.852 15.6 18 14.664 18 13.716V12C18 8.688 15.312 6 12 6C8.688 6 6 8.688 6 12C6 15.312 8.688 18 12 18C13.656 18 15.168 17.328 16.248 16.236C17.028 17.304 18.372 18 19.8 18C22.164 18 24 16.08 24 13.716V12C24 5.376 18.624 0 12 0ZM12 15.6C10.008 15.6 8.4 13.992 8.4 12C8.4 10.008 10.008 8.4 12 8.4C13.992 8.4 15.6 10.008 15.6 12C15.6 13.992 13.992 15.6 12 15.6Z" fill="white"/>
+</svg>