UX: Add bookmark-delete icon (#23025)

lib/svg_sprite.rb

@@ -34,6 +34,7 @@ module SvgSprite
         book
         book-reader
         bookmark
+        bookmark-delete
         briefcase
         bullseye
         calendar-alt

vendor/assets/svg-icons/discourse-additional.svg

@@ -60,4 +60,9 @@ Additional SVG icons
   <symbol id="temporary-twitter-x" viewBox="0 0 512 512">
     <path d="M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z"/>
   </symbol>
+  <symbol id="bookmark-delete" viewBox="0 0 16 20">
+    <path id="icon-bookmark__main" d="M0 20V5.5C0 4.6875 0.65625 4 1.5 4H10.5C11.3125 4 12 4.6875 12 5.5V20L6 16.5L0 20Z" fill="var(--tertiary)"/>
+    <circle id="icon-bookmark__delete-x" cx="11.5" cy="6.5" r="3.5" fill="var(--secondary)"/>
+    <path id="icon-bookmark__delete-bg" d="M11 1.40625C13.6758 1.40625 15.8438 3.57422 15.8438 6.25C15.8438 8.92578 13.6758 11.0938 11 11.0938C8.32422 11.0938 6.15625 8.92578 6.15625 6.25C6.15625 3.57422 8.32422 1.40625 11 1.40625ZM13.3633 7.53906L12.0938 6.25L13.3633 4.98047C13.4609 4.90234 13.4609 4.74609 13.3633 4.64844L12.6016 3.88672C12.5039 3.78906 12.3477 3.78906 12.2695 3.88672L11 5.15625L9.73047 3.88672C9.63281 3.78906 9.47656 3.78906 9.39844 3.88672L8.61719 4.64844C8.51953 4.74609 8.51953 4.90234 8.61719 4.98047L9.90625 6.25L8.61719 7.51953C8.51953 7.61719 8.51953 7.77344 8.61719 7.85156L9.37891 8.63281C9.47656 8.73047 9.63281 8.73047 9.71094 8.63281L11 7.34375L12.2695 8.63281C12.3477 8.73047 12.5039 8.73047 12.6016 8.63281L13.3633 7.87109C13.4609 7.77344 13.4609 7.61719 13.3633 7.53906Z" fill="var(--danger)"/>
+  </symbol>
 </svg>