feat: add dark mode and announcement component

themes/sakura-dreams-dark/about.json

@@ -0,0 +1,14 @@
+{
+  "name": "Sakura Dreams Dark",
+  "component": false,
+  "license_url": null,
+  "about_url": null,
+  "authors": null,
+  "theme_version": null,
+  "minimum_discourse_version": null,
+  "maximum_discourse_version": null,
+  "assets": {},
+  "color_schemes": {},
+  "modifiers": {},
+  "learn_more": "https://meta.discourse.org/t/beginners-guide-to-using-discourse-themes/91966"
+}

themes/sakura-dreams-dark/common/common.scss

@@ -0,0 +1,20 @@
+body::before {
+  background: url(https://cdn.nhcarrigan.com/background.png);
+  background-size: cover;
+  background-position: center;
+  width: 100%;
+  height: 100%;
+  z-index: -1;
+  content: "";
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  opacity: 1;
+  pointer-events: none;
+}
+
+body {
+    background-color: #7a2048dd;
+}