Add screen slider component

CHDataManagement/Generator/HeaderElement.swift

@@ -52,6 +52,8 @@ enum HeaderElement {
 
     case manifest(FileResource)
 
+    case style(String)
+
     var order: Int {
         switch self {
         case .charset: 1
@@ -69,6 +71,7 @@ enum HeaderElement {
         case .ogDescription: 104
         case .ogImage: 105
         case .ogUrl: 106
+        case .style: 200
         }
     }
 
@@ -136,6 +139,8 @@ extension HeaderElement {
             return "<meta name='robots' content='noindex'>"
         case .manifest(let file):
             return "<link rel='manifest' href='\(file.absoluteUrl)'>"
+        case .style(let style):
+            return "<style>\(style)</style>"
         }
     }
 }
@@ -174,6 +179,8 @@ extension HeaderElement: CustomStringConvertible {
             return "robots"
         case .manifest:
             return "manifest"
+        case .style:
+            return "style"
         }
     }
 }