Snapshot of JC3636W518EN kit before demo folder cleanup

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2-Program Example/Demo_Arduino/library/lvgl/docs/widgets/extra/spinner.md

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+# Spinner (lv_spinner)
+
+## Overview
+The Spinner object is a spinning arc over a ring.
+
+## Parts and Styles
+The parts are identical to the parts of [lv_arc](/widgets/core/arc).
+
+## Usage
+
+### Create a spinner
+
+To create a spinner use `lv_spinner_create(parent, spin_time, arc_length)`. `spin time` sets the spin time in milliseconds, `arc_length` sets the length of the spinning arc in degrees.
+
+## Events
+No special events are sent to the Spinner.
+
+See the events of the [Arc](/widgets/core/arc) too.
+
+Learn more about [Events](/overview/event).
+
+## Keys
+No *Keys* are processed by the object type.
+
+Learn more about [Keys](/overview/indev).
+
+
+
+## Example
+
+```eval_rst
+
+.. include:: ../../../examples/widgets/spinner/index.rst
+
+```
+
+## API
+
+```eval_rst
+
+.. doxygenfile:: lv_spinner.h
+  :project: lvgl
+
+```