Updated Container docs

updated docs for container (child instead of object)

docs/objects/Container/getDeepChild.md

@@ -0,0 +1,30 @@
+## getDeepChild
+
+### Description
+
+Retrieves an object from the container or its descendants by its ID. This method searches recursively through all child containers to find the object.
+
+### 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 container = main:addFrame("container")
+local button = container:addButton("myButton")
+    :setPosition(2, 2)
+    :setText("My Button")
+-- Get the button object by its ID, searching through all containers
+local retrievedButton = main:getDeepChild("myButton")
+if retrievedButton then
+    basalt.debug("Button found!")
+end
+
+basalt.autoUpdate()
+```