feat: add Storybook component explorer

.storybook/main.ts

@@ -0,0 +1,19 @@
+import type { StorybookConfig } from "@storybook/sveltekit";
+
+const config: StorybookConfig = {
+  stories: ["../src/**/*.mdx", "../src/**/*.stories.@(js|ts|svelte)"],
+  addons: [
+    "@storybook/addon-svelte-csf",
+    "@storybook/addon-a11y",
+    "@storybook/addon-vitest",
+  ],
+  framework: {
+    name: "@storybook/sveltekit",
+    options: {},
+  },
+  docs: {
+    autodocs: "tag",
+  },
+};
+
+export default config;

.storybook/preview.ts

@@ -0,0 +1,23 @@
+import "../src/app.css";
+import type { Preview } from "@storybook/sveltekit";
+
+const preview: Preview = {
+  parameters: {
+    backgrounds: {
+      default: "canvas",
+      values: [
+        { name: "canvas", value: "#020302" },
+        { name: "raised", value: "#0b0d0c" },
+      ],
+    },
+    controls: {
+      matchers: {
+        color: /(background|color)$/i,
+        date: /Date$/i,
+      },
+    },
+    layout: "fullscreen",
+  },
+};
+
+export default preview;