.readthedocs.yaml: migrate configuration from web app

Read the Docs is deprecating their web configuration. This commit
should migrate said configuration to the newly recommended YAML format.

diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644 (file)
index 0000000..690ee8d
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,17 @@
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+sphinx:
+  configuration: doc/conf.py
+
+python:
+  install:
+    - requirements: doc/requirements.txt
+
+formats:
+  - pdf
+  - epub