Treeview Docs

Added Treeview docs
Improved some stuff in the treeview object

docs/objects/Treeview/setScrollable.md

@@ -0,0 +1,30 @@
+## setScrollable
+
+### Description
+
+Sets the scrollability of the Treeview object. If set to `true`, the Treeview will be scrollable; if set to `false`, it will not be scrollable.
+Default: `true`
+
+### Parameters
+
+1. `boolean` A boolean value indicating whether the Treeview should be scrollable (true) or not (false).
+
+### Returns
+
+1. `object` The object in use
+
+### Usage
+
+* Creates a Treeview and sets it to be scrollable:
+
+```lua
+local basalt = require("basalt")
+
+local mainFrame = basalt.createFrame()
+local treeview = mainFrame:addTreeview()
+  :setScrollable(true)
+
+basalt.autoUpdate()
+```
+
+In this example, a Treeview object is created and added to the mainFrame. The `setScrollable` method is used to set the Treeview object as scrollable by passing the true boolean value.