Treeview Docs

Added Treeview docs
Improved some stuff in the treeview object

docs/objects/Treeview/getRoot.md

@@ -0,0 +1,28 @@
+## getRoot
+
+### Description
+
+Retrieves the root node of the Treeview object.
+
+### Returns
+
+1. `node` The root node of the Treeview object
+
+### Usage
+
+* Creates a Treeview and retrieves its root node:
+
+```lua
+local basalt = require("basalt")
+
+local mainFrame = basalt.createFrame()
+local treeview = mainFrame:addTreeview()
+
+local rootNode = treeview:getRoot()
+
+basalt.debug("Root node:", rootNode)
+
+basalt.autoUpdate()
+```
+
+In this example, a Treeview object is created and added to the mainFrame. The `getRoot` method is used to retrieve the root node of the Treeview object.