Add MaterialIcons.Add for the demo

Author: ShreckYe

compose-multiplatform-material/src/commonMain/kotlin/com/huanshankeji/compose/material/icon/MaterialIcons.kt

@@ -3,6 +3,7 @@ package com.huanshankeji.compose.material.icon
 expect class MaterialIcon
 
 expect object MaterialIcons {
-    val Menu : MaterialIcon
+    val Add: MaterialIcon
+    val Menu: MaterialIcon
     val Search : MaterialIcon
 }

compose-multiplatform-material/src/jsMain/kotlin/com/huanshankeji/compose/material/icon/MaterialIcons.kt

@@ -5,6 +5,7 @@ import dev.petuska.kmdcx.icons.MDCIcon
 actual class MaterialIcon(val mdcIcon: MDCIcon)
 
 actual object MaterialIcons {
+    actual val Add = MaterialIcon(MDCIcon.Add)
     actual val Menu = MaterialIcon(MDCIcon.Menu)
     actual val Search = MaterialIcon(MDCIcon.Search)
 }

compose-multiplatform-material/src/jvmMain/kotlin/com/huanshankeji/compose/material/icon/MaterialIcons.kt

@@ -1,13 +1,15 @@
 package com.huanshankeji.compose.material.icon
 
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.Menu
 import androidx.compose.material.icons.filled.Search
 import androidx.compose.ui.graphics.vector.ImageVector
 
 actual typealias MaterialIcon = ImageVector
 
 actual object MaterialIcons {
+    actual val Add = Icons.Default.Add
     actual val Menu = Icons.Default.Menu
     actual val Search = Icons.Default.Search
 }

demo/src/commonMain/kotlin/com/huanshankeji/compose/material/demo/Composables.kt

@@ -35,7 +35,7 @@ fun App() {
                     Button(onClick) {
                         Label(count.toString())
                     }
-                    IconButton(onClick, materialIcon = MaterialIcons.Search, contentDescription = "increment count")
+                    IconButton(onClick, materialIcon = MaterialIcons.Add, contentDescription = "increment count")
                 }
 
                 Box({