Remove fomantic button module (#30475)

CSS-only module. Button colors are reduced to this:

<img width="639" alt="Screenshot 2024-04-14 at 15 36 07"
src="882d6c02-d1de-44f2-b707-db02a9f5070d">

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/css/helpers.css

@@ -52,6 +52,9 @@ only use:
 */
 .tw-hidden.tw-hidden { display: none !important; }
 
+/* proposed class from https://github.com/tailwindlabs/tailwindcss/pull/12128 */
+.tw-break-anywhere { overflow-wrap: anywhere !important; }
+
 @media (max-width: 767.98px) {
   /* double selector so it wins over .tw-flex (old .gt-df) etc */
   .not-mobile.not-mobile {