feat: Adds more navigation items to sidebar and removes top navigation bar.

Sources/Docs/Extensions.swift

@@ -56,6 +56,8 @@ extension Item where M == ArticleMetadata {
 
 extension Array where Element == Item<ArticleMetadata> {
 
+  /// Iterate through the aritcles, getting all the years that articles
+  /// have been written or updated.
   func years() -> Set<String> {
     let dateFormatter = DateFormatter()
     dateFormatter.dateFormat = "yyyy"
@@ -68,6 +70,7 @@ extension Array where Element == Item<ArticleMetadata> {
     }
   }
 
+  /// Iterate through the articles and get the unique tags.
   func uniqueTags() -> Set<String> {
     reduce(into: Set()) { set, item in
       for tag in item.metadata.tags {
@@ -75,6 +78,14 @@ extension Array where Element == Item<ArticleMetadata> {
       }
     }
   }
+
+  /// Iterate through the articles and get the unique tags along with the count of
+  /// how many times the tag is used.
+  func uniqueTagsWithCount() -> [(String, Int)] {
+    let tags = flatMap { $0.metadata.tags }
+    let tagsWithCounts = tags.reduce(into: [:]) { $0[$1, default: 0] += 1 }
+    return tagsWithCounts.sorted { $0.1 > $1.1 }
+  }
 }
 
 // NOTE: Most of these are taken from https://github.com/loopwerk/loopwerk.io