Core design system + themes (#75)

* First pass on styles

* Root page headers with subtitles, working accent color

* Working theme system

* Top level layout

* Tutorial Layout

* Content grid system

* Responsive type

* ReferenceItemLayout

Author: stalgiag

.eslintrc.cjs

@@ -23,6 +23,9 @@ module.exports = {
     {
       files: ["*.ts", "*.tsx"],
       extends: ["plugin:@typescript-eslint/recommended"],
+      rules: {
+        "@typescript-eslint/no-explicit-any": "off",
+      },
     },
   ],
   parser: "@typescript-eslint/parser",