feat: Adds sidebar to articles view.

Sources/Docs/Templates/RenderArticles.swift

@@ -9,13 +9,13 @@ func renderArticles(context: ItemsRenderingContext<ArticleMetadata>) -> NodeConv
   let articlesPerYear = Dictionary(grouping: context.items, by: { dateFormatter.string(from: $0.date) })
   let sortedByYearDescending = articlesPerYear.sorted { $0.key > $1.key }
 
-  return ArticleGrid(
-    articles: sortedByYearDescending,
+  return baseRenderArticles(
+    sortedByYearDescending,
     canocicalURL: "/articles/",
     title: "Articles",
     rssLink: "",
     extraHeader: "",
-    header: yearHeader(_:)
+    label: yearHeader(_:)
   )
 }
 
@@ -74,6 +74,25 @@ private func yearHeader(_ year: String) -> Node {
   }
 }
 
+private func baseRenderArticles(
+  _ articles: [(key: String, value: [Item<ArticleMetadata>])],
+  canocicalURL: String,
+  title pageTitle: String,
+  rssLink: String = "",
+  extraHeader: NodeConvertible = Node.fragment([]),
+  @NodeBuilder label: @escaping (String) -> Node = { _ in Node.fragment([]) }
+) -> NodeConvertible {
+  ArticleGrid(
+    articles: articles,
+    canocicalURL: canocicalURL,
+    title: pageTitle,
+    rssLink: rssLink,
+    extraHeader: extraHeader
+  ) { key in
+    label(key)
+  }
+}
+
 private func baseRenderArticles(
   _ articles: (key: String, value: [Item<ArticleMetadata>]),
   canocicalURL: String,