Added icons, helperfunction and new fancy notice message

Added icons from webcrunch resp. heroicons
Added helperfunction to display inline svg with the plugin inline-svg
Implemented fancy notice message webcrunch. Realy nice but does only
work with javascript on.

app/assets/images/icons/outline/fire.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" aria-hidden="true">
+  <path stroke-linecap="round" stroke-linejoin="round" d="M15.362 5.214A8.252 8.252 0 0112 21 8.25 8.25 0 016.038 7.048 8.287 8.287 0 009 9.6a8.983 8.983 0 013.361-6.867 8.21 8.21 0 003 2.48z"/>
+  <path stroke-linecap="round" stroke-linejoin="round" d="M12 18a3.75 3.75 0 00.495-7.467 5.99 5.99 0 00-1.925 3.546 5.974 5.974 0 01-2.133-1A3.75 3.75 0 0012 18z"/>
+</svg>