Update docs

docs/source/example.rst

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+Пример
+======
+
+.. literalinclude:: ../../example.py
+   :language: python
+   :lines: 6-

docs/source/index.rst

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+.. Validator documentation master file, created by
+   sphinx-quickstart on Sat Feb 19 01:17:02 2022.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Валидатор
+=========
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Содержание:
+
+   example
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
+
+Сборка
+------
+
+.. code::
+
+   pip install flit
+   python -m build
+
+Установка
+---------
+
+.. code::
+
+   pip install dist/validator-2.0-py3-none-any.whl