Drop component and Navbar improvements

src/jsMain/kotlin/dev/inmo/jsuikit/elements/Drop.kt

@@ -0,0 +1,24 @@
+package dev.inmo.jsuikit.elements
+
+import androidx.compose.runtime.Composable
+import dev.inmo.jsuikit.modifiers.UIKitDrop
+import dev.inmo.jsuikit.modifiers.attrsBuilder
+import dev.inmo.jsuikit.utils.*
+import org.jetbrains.compose.web.dom.Div
+import org.w3c.dom.HTMLButtonElement
+import org.w3c.dom.HTMLDivElement
+
+@Composable
+fun Drop(
+    buttonBuilder: AttrsWithContentBuilder<HTMLButtonElement>,
+    dropBuilder: AttrsWithContentBuilder<HTMLDivElement>
+) {
+    DefaultButton(
+        attributesCustomizer = buttonBuilder.attributesBuilderContext,
+        contentAllocator = buttonBuilder.builder
+    )
+    Div(
+        (Attrs<HTMLDivElement>(UIKitDrop.Custom()) + dropBuilder.attrs).builder,
+        dropBuilder.builder
+    )
+}