feat: add more header buttons

Author: velut

src/components/AboutButton.astro

@@ -0,0 +1,8 @@
+---
+import LucideInfo from "~icons/lucide/info";
+---
+
+<a href="/about" class="btn-sm-outline">
+	<LucideInfo class="size-4" />
+	<span>About</span>
+</a>

src/components/DonateButton.astro

@@ -0,0 +1,8 @@
+---
+import LucideHeart from "~icons/lucide/heart";
+---
+
+<a href="/donate" class="btn-sm-outline">
+	<LucideHeart class="size-4" />
+	<span>Donate</span>
+</a>

src/components/JsDocsIoButton.astro

@@ -0,0 +1,8 @@
+---
+import LucidePackageSearch from "~icons/lucide/package-search";
+---
+
+<a href="/" class="flex items-center gap-2">
+	<LucidePackageSearch class="size-6" />
+	<span class="font-bold">jsDocs.io</span>
+</a>