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/arrow-down-on-square-stack.svg

@@ -0,0 +1,3 @@
+<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="M7.5 7.5h-.75A2.25 2.25 0 004.5 9.75v7.5a2.25 2.25 0 002.25 2.25h7.5a2.25 2.25 0 002.25-2.25v-7.5a2.25 2.25 0 00-2.25-2.25h-.75m-6 3.75l3 3m0 0l3-3m-3 3V1.5m6 9h.75a2.25 2.25 0 012.25 2.25v7.5a2.25 2.25 0 01-2.25 2.25h-7.5a2.25 2.25 0 01-2.25-2.25v-.75"/>
+</svg>