feat: Adds link sharing document.

Sources/Docs/Templates/HomeLink.swift

@@ -1,5 +1,6 @@
 import HTML
 
+/// Represents homepage link configuration.
 struct HomeLink {
   let icon: String
   let title: String
@@ -14,6 +15,7 @@ struct HomeLink {
 }
 
 extension HomeLink {
+  /// Create an internal link (opens in the same tab).
   static func `internal`(
     _ title: String,
     icon: String,
@@ -23,6 +25,7 @@ extension HomeLink {
     self.init(icon: icon, title: title, description: description, href: href, linkType: .internal)
   }
 
+  /// Create an external link (opens in a different tab).
   static func external(
     _ title: String,
     icon: String,