Move to custom SSG instead of eleventy.

docs/renderer/util/feather-icons.js

@@ -0,0 +1,19 @@
+import feather from 'feather-icons'
+
+const defaultAttributes = {
+    "class": "feather feather-x",
+    "xmlns": "http://www.w3.org/2000/svg",
+    "width": 24,
+    "height": 24,
+    "viewBox": "0 0 24 24",
+    "fill": "none",
+    "stroke": "currentColor",
+    "stroke-width": 2,
+    "stroke-linecap": "round",
+    "stroke-linejoin": "round",
+}
+
+export default (iconName, attributes = {}) => {
+    attributes = { ...defaultAttributes, ...attributes }
+    return feather.icons[iconName].toSvg(attributes)
+}