fix: mark NpmPackageSearch as client:only

With client:load the $state import from runed is not found at build
time.

Author: velut

src/components/Header.astro

@@ -11,7 +11,7 @@ import ThemeButton from "./ThemeButton.svelte";
     <JsDocsIoButton />
 
     <div class="flex items-center gap-4">
-      <NpmPackageSearchButton client:load />
+      <NpmPackageSearchButton client:only />
 
       <div class="hidden md:flex md:items-center md:gap-4">
         <div class="bg-border h-8 w-px"></div>

src/layouts/RootLayout.astro

@@ -77,7 +77,7 @@ const ogImageAlt = "Social image for jsDocs.io";
 
     <slot name="modals" />
 
-    <NpmPackageSearch client:load />
+    <NpmPackageSearch client:only />
 
     <script src="../scripts/add-copy-buttons.ts"></script>
   </body>