feat: deselect all nodes when switching to single or none selection mode

This change ensures that when the selection mode of the TreeView is changed to single or none, all previously selected nodes are deselected. This provides a consistent and predictable behavior for these selection modes.

treeview/src/main/kotlin/io/github/dingyi222666/view/treeview/TreeView.kt

@@ -501,7 +501,7 @@ class TreeView<T : Any>(context: Context, attrs: AttributeSet?, defStyleAttr: In
             return
         }
         coroutineScope.launch {
-            if (old !== SelectionMode.NONE) {
+            if (new == SelectionMode.SINGLE || new == SelectionMode.NONE) {
                 tree.selectAllNode(false)
             }
             refresh(true)