Add index.rst as the main entry point for Sphinx documentation

- Created index.rst in the docs/ directory as the main entry point for the Sphinx documentation.
- Added a toctree directive to organize module and content references in the documentation.
- Includes sections for indices, search, and other structured content.

This file serves as the top-level structure for the Sphinx documentation system.

Author: KazerL

docs/index.rst

@@ -0,0 +1,18 @@
+Welcome to AI Object Recognition's Documentation!
+=================================================
+
+Contents:
+---------
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Modules:
+
+   modules  # Add module documentation here if using `automodule`
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`