switch from gulp to vite to build, add types for reveal.js config

css/theme/night.scss

@@ -0,0 +1,34 @@
+/**
+ * Black theme for reveal.js.
+ *
+ * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
+ */
+
+// Default mixins and settings -----------------
+@use "sass:color";
+@import "../template/mixins";
+@import "../template/settings";
+// ---------------------------------------------
+
+// Include theme-specific fonts
+@import url(https://fonts.googleapis.com/css?family=Montserrat:700);
+@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,700,400italic,700italic);
+
+// Override theme settings (see ../template/settings.scss)
+$backgroundColor: #111;
+
+$mainFont: "Open Sans", sans-serif;
+$linkColor: #e7ad52;
+$linkColorHover: color.scale($linkColor, $lightness: 20%);
+$headingFont: "Montserrat", Impact, sans-serif;
+$headingTextShadow: none;
+$headingLetterSpacing: -0.03em;
+$headingTextTransform: none;
+$selectionBackgroundColor: #e7ad52;
+
+// Change text colors against light slide backgrounds
+@include light-bg-text-color(#222);
+
+// Theme template ------------------------------
+@import "./template/theme";
+// ---------------------------------------------