Add `Link` support

Sources/TokamakStaticHTML/Views/Buttons/Link.swift

@@ -26,3 +26,17 @@ extension Link: _HTMLPrimitive {
     })
   }
 }
+
+@_spi(TokamakStaticHTML)
+extension Link: HTMLConvertible {
+  public var tag: String { "a" }
+  public func attributes(useDynamicLayout: Bool) -> [HTMLAttribute: String] {
+    ["href": _LinkProxy(self).destination.absoluteString, "class": "_tokamak-link"]
+  }
+
+  public func primitiveVisitor<V>(useDynamicLayout: Bool) -> ((V) -> ())? where V: ViewVisitor {
+    {
+      $0.visit(_LinkProxy(self).label)
+    }
+  }
+}