feat: Adds update and delete routes to room.

Sources/Styleguide/ElementaryExtensions.swift

@@ -14,3 +14,18 @@ extension HTMLAttribute where Tag == HTMLTag.form {
     action(SiteRoute.View.router.path(for: route))
   }
 }
+
+extension HTMLAttribute where Tag == HTMLTag.input {
+
+  public static func value(_ string: String?) -> Self {
+    value(string ?? "")
+  }
+
+  public static func value(_ int: Int?) -> Self {
+    value(int == nil ? "" : "\(int!)")
+  }
+
+  public static func value(_ double: Double?) -> Self {
+    value(double == nil ? "" : "\(double!)")
+  }
+}