Update docs and README (#17)

* Move readme content to index.rst

* Clean up project name

* Add advanced configuration

docs/source/index.rst

@@ -9,31 +9,13 @@ A `Sphinx`_ extension that generates a summary ``llms.txt`` file, written in Mar
    :maxdepth: 2
 
    getting-started
+   advanced-configuration
    configuration-values
    contributing
    changelog
 
-Features
---------
-
-Sphinx LLMs.txt provides the following features:
-
-- Creates ``llms.txt`` and ``llms-full.txt``
-- Automatically add content from ``include`` directives
-- Resolves relative paths in directives like ``image`` and ``figure`` to use full paths
-   - Ability to add list of custom directives with ``llms_txt_directives``
-   - Optionally, prepend a base URL using Sphinx's ``html_baseurl``
-- Ability to exclude pages
-
-Example
--------
-
-You can see this Sphinx projects `llms.txt`_ and `llms-full.txt`_ files as a simple example.
-
 
 .. _Sphinx: http://sphinx-doc.org/
-.. _llms.txt: https://sphinx-llms-txt.readthedocs.io/en/latest/llms.txt
-.. _llms-full.txt: https://sphinx-llms-txt.readthedocs.io/en/latest/llms-full.txt
 
 .. |PyPI version| image:: https://img.shields.io/pypi/v/sphinx-llms-txt.svg
    :target: https://pypi.python.org/pypi/sphinx-llms-txt