support of UIKitHeight, AttributesBuilder and Percents/Pixels abstractions

src/jsMain/kotlin/dev/inmo/jsuikit/utils/AttributeBuilder.kt

@@ -0,0 +1,21 @@
+package dev.inmo.jsuikit.utils
+
+class AttributeBuilder (
+    val attributeName: String,
+    private val parametersPreset: MutableMap<String, String?> = mutableMapOf()
+) {
+
+    fun add(k: String, v: String? = null) = parametersPreset.set(k, v)
+    infix fun String.to(value: String?) = add(this, value)
+    operator fun String.unaryPlus() = add(this, null)
+
+    fun build(): Pair<String, String> = Pair(
+        attributeName, parametersPreset.toList().joinToString(";") {
+            "${it.first}${it.second ?.let { ": $it" } ?: ""}"
+        }
+    )
+}
+
+inline fun buildAttribute(attributeName: String, block: AttributeBuilder.() -> Unit) = AttributeBuilder(
+    attributeName
+).apply(block).build()