Add Read The Docs configuration file. (django-compressor#1212)

Copied from https://docs.readthedocs.io/en/stable/config-file/v2.html

Switched to Python 3.11, since the project doesn't explicitly
use 3.12 yet.

Co-authored-by: dawnwages <dawn.wages@gmail.com>
Co-authored-by: okumujustine <okumujustine01@gmail.com>
Co-authored-by: MarkoM-dot <83985775+MarkoM-dot@users.noreply.github.com>
Co-authored-by: marksweb <theshow@gmail.com>
Co-authored-by: Sandjio <emmasandjio@gmail.com>
Co-authored-by: bilenko-ha1305 <dinozzzzzawrik@gmail.com>
Co-authored-by: sabderemane <sarahabderemane@gmail.com>

Author: 8 people

.readthedocs.yaml

@@ -0,0 +1,15 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.11"
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/conf.py