(chore) Add support for .scss and tailwindcss

cfg/postcss.config.ts

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+import tailwind from "tailwindcss";
+import autoprefixer from "autoprefixer";
+import cssnanoPlugin from "cssnano";
+
+import tailwindConfig from "./tailwind.config";
+const mode = process.env.NODE_ENV;
+const dev = mode === "development";
+
+export default {
+    plugins: (() => {
+        let plugins = [
+            // Some plugins, like TailwindCSS/Nesting, need to run before Tailwind.
+            tailwind(tailwindConfig),
+
+            // But others, like autoprefixer, need to run after.
+            autoprefixer()
+        ];
+
+        !dev && cssnanoPlugin({
+            preset: "default"
+        });
+
+        return plugins;
+    })()
+};

cfg/tailwind.config.ts

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+import { Config } from "tailwindcss";
+
+export default {
+    content: ["./src/**/*.{html,js,tsx,ts}"],
+    mode: "jit",
+    theme: {
+        extend: {}
+    },
+    darkMode: "class",
+    plugins: []
+} as Config;