Fixed readthedoc issue.

Configuration file is required for readthedoc portal to build PyEZ docs.
https://docs.readthedocs.io/en/stable/config-file/v2.html

.readthedocs.yml

@@ -0,0 +1,20 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats: all
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.12
+  install:
+    - requirements: docs/requirements.txt
+    - requirements: requirements.txt

docs/requirements.txt

@@ -0,0 +1 @@
+sphinx_bootstrap_theme