feat(site): add pink heart sponsor button next to crates.io

- Add GitHub Sponsors button with pink styling
- Position after crates.io button on the right
- Include heart icon and hover state

Author: matthewjberger

site/src/pages/home.rs

@@ -48,6 +48,17 @@ pub fn Home() -> impl IntoView {
                             </svg>
                             "crates.io"
                         </a>
+                        <a
+                            href="https://github.com/sponsors/matthewjberger"
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            class="inline-flex items-center px-6 py-3 bg-pink-600 hover:bg-pink-700 text-white font-semibold rounded-lg transition-colors duration-200"
+                        >
+                            <svg class="w-5 h-5 mr-2" fill="currentColor" viewBox="0 0 20 20">
+                                <path fill-rule="evenodd" d="M3.172 5.172a4 4 0 015.656 0L10 6.343l1.172-1.171a4 4 0 115.656 5.656L10 17.657l-6.828-6.829a4 4 0 010-5.656z" clip-rule="evenodd"/>
+                            </svg>
+                            "Sponsor"
+                        </a>
                     </div>
                 </div>
             </header>