add support of close element

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

@@ -0,0 +1,17 @@
+package dev.inmo.jsuikit.modifiers
+
+sealed class UIKitClose(
+    override val classes: Array<String> = emptyArray(),
+    override val otherAttrs: Map<String, String> = emptyMap()
+) : UIKitModifier {
+
+    object Large : UIKitClose(
+        arrayOf("uk-close-large")
+    )
+
+    companion object : UIKitClose(
+        arrayOf("uk-close"),
+        mapOf("uk-close" to "")
+    )
+
+}