add readthedocs config

.readthedocs.yml

@@ -0,0 +1,16 @@
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+formats:
+   - pdf
+   - epub