add UIKitComment, Comment element, upfill UIKitSubNav

src/jsMain/kotlin/dev/inmo/jsuikit/modifiers/UIKitComment.kt

@@ -0,0 +1,17 @@
+package dev.inmo.jsuikit.modifiers
+
+sealed class UIKitComment(suffix: String?) : UIKitModifier {
+    override val classes: Array<String> = arrayOf("uk-comment${suffix ?.let { "-$it" } ?: ""}")
+
+    object Body : UIKitComment("body")
+    object Header : UIKitComment("header")
+    object Title : UIKitComment("title")
+    object Meta : UIKitComment("meta")
+    object Avatar : UIKitComment("avatar")
+
+    object Primary : UIKitComment("primary")
+
+    object List : UIKitComment("list")
+
+    companion object : UIKitComment(null)
+}