mv module integrations docs (#8101)

docs/extras/integrations/document_loaders/example_data/README.rst

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+Example Docs
+------------
+
+The sample docs directory contains the following files:
+
+-  ``example-10k.html`` - A 10-K SEC filing in HTML format
+-  ``layout-parser-paper.pdf`` - A PDF copy of the layout parser paper
+-  ``factbook.xml``/``factbook.xsl`` - Example XML/XLS files that you
+   can use to test stylesheets
+
+These documents can be used to test out the parsers in the library. In
+addition, here are instructions for pulling in some sample docs that are
+too big to store in the repo.
+
+XBRL 10-K
+^^^^^^^^^
+
+You can get an example 10-K in inline XBRL format using the following
+``curl``. Note, you need to have the user agent set in the header or the
+SEC site will reject your request.
+
+.. code:: bash
+
+   curl -O \
+     -A '${organization} ${email}'
+     https://www.sec.gov/Archives/edgar/data/311094/000117184321001344/0001171843-21-001344.txt
+
+You can parse this document using the HTML parser.