Updated Container docs

updated docs for container (child instead of object)

docs/objects/Container/getChild.md

@@ -0,0 +1,30 @@
+## getChild
+
+### Description
+
+Retrieves an object from the container by its ID.
+
+### Parameters
+
+1. `string` id - The ID of the object you want to retrieve.
+
+### Returns
+
+1. `object` The object with the specified ID, or nil if no object with that ID is found.
+
+### Usage
+
+```lua
+local main = basalt.createFrame()
+local button = main:addButton("myButton")
+    :setPosition(2, 2)
+    :setText("My Button")
+
+-- Get the button object by its ID
+local retrievedButton = main:getChild("myButton")
+if retrievedButton then
+    basalt.debug("Button found!")
+end
+
+basalt.autoUpdate()
+```