feat: Add inital dark/light mode switching

templates/assets/css/theme.css

@@ -0,0 +1,30 @@
+[data-bs-theme=auto] .dark-only {
+  display: none;
+}
+
+[data-bs-theme=light] .dark-only {
+  display: none;
+}
+
+/* [data-bs-theme=dark] .dark-only {
+  display: initial;
+}
+
+[data-bs-theme=light] .light-only {
+  display: initial;
+} */
+
+[data-bs-theme=dark] .light-only {
+  display: none;
+}
+
+[data-bs-theme=dark] .page.landing-page {
+  background: rgba(0,0,0,0.79);
+}
+
+.clean-block.clean-hero::before {
+  background: url("/assets/img/backgrounds/blocksaug.svg") center / contain no-repeat;
+  color: rgba(0,0,0,0);
+  filter: opacity(20%);
+}
+