add first version of tailwind docs

src/components/ModeToggle.jsx

@@ -0,0 +1,54 @@
+function SunIcon(props) {
+  return (
+    <svg viewBox="0 0 20 20" fill="none" aria-hidden="true" {...props}>
+      <path d="M12.5 10a2.5 2.5 0 1 1-5 0 2.5 2.5 0 0 1 5 0Z" />
+      <path
+        strokeLinecap="round"
+        d="M10 5.5v-1M13.182 6.818l.707-.707M14.5 10h1M13.182 13.182l.707.707M10 15.5v-1M6.11 13.889l.708-.707M4.5 10h1M6.11 6.111l.708.707"
+      />
+    </svg>
+  )
+}
+
+function MoonIcon(props) {
+  return (
+    <svg viewBox="0 0 20 20" fill="none" aria-hidden="true" {...props}>
+      <path d="M15.224 11.724a5.5 5.5 0 0 1-6.949-6.949 5.5 5.5 0 1 0 6.949 6.949Z" />
+    </svg>
+  )
+}
+
+export function ModeToggle() {
+  function disableTransitionsTemporarily() {
+    document.documentElement.classList.add('[&_*]:!transition-none')
+    window.setTimeout(() => {
+      document.documentElement.classList.remove('[&_*]:!transition-none')
+    }, 0)
+  }
+
+  function toggleMode() {
+    disableTransitionsTemporarily()
+
+    let darkModeMediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
+    let isSystemDarkMode = darkModeMediaQuery.matches
+    let isDarkMode = document.documentElement.classList.toggle('dark')
+
+    if (isDarkMode === isSystemDarkMode) {
+      delete window.localStorage.isDarkMode
+    } else {
+      window.localStorage.isDarkMode = isDarkMode
+    }
+  }
+
+  return (
+    <button
+      type="button"
+      className="flex h-6 w-6 items-center justify-center rounded-md transition hover:bg-zinc-900/5 dark:hover:bg-white/5"
+      aria-label="Toggle dark mode"
+      onClick={toggleMode}
+    >
+      <SunIcon className="h-5 w-5 stroke-zinc-900 dark:hidden" />
+      <MoonIcon className="hidden h-5 w-5 stroke-white dark:block" />
+    </button>
+  )
+}