feat:updated diagram (#231)

* feat:updated diagram

* fix: image

* Update README.rst

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

---------

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

Author: vinitkumar

README.rst

@@ -20,6 +20,14 @@ Documentation: https://json2xml.readthedocs.io.
 
 The library was initially dependent on the `dict2xml` project, but it has now been integrated into json2xml itself. This has led to cleaner code, the addition of types and tests, and overall improved performance.
 
+
+
+Architecture Diagram
+^^^^^^^^^^^^^^^^^^^^
+
+.. image:: ./diagram.png
+
+
 Features
 ^^^^^^^^