Add .readthedocs.yaml for LFS support

Author: ahosier

.readthedocs.yaml

@@ -0,0 +1,27 @@
+# Read the Docs configuration file.
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details.
+
+version: 2
+build:
+   os: ubuntu-22.04
+   tools:
+      python: "3.7"
+   jobs:
+      post_checkout:
+         # Download and uncompress the binary
+         # https://git-lfs.github.com/
+         - wget https://github.com/git-lfs/git-lfs/releases/download/v3.1.4/git-lfs-linux-amd64-v3.1.4.tar.gz
+         - tar xvfz git-lfs-linux-amd64-v3.1.4.tar.gz
+         # Modify LFS config paths to point where git-lfs binary was downloaded
+         - git config filter.lfs.process "`pwd`/git-lfs filter-process"
+         - git config filter.lfs.smudge  "`pwd`/git-lfs smudge -- %f"
+         - git config filter.lfs.clean "`pwd`/git-lfs clean -- %f"
+         # Make LFS available in current repository
+         - ./git-lfs install
+         # Download content from remote
+         - ./git-lfs fetch
+         # Make local files to have the real content on them
+         - ./git-lfs checkout
+
+sphinx:
+   configuration: documentation/source/conf.py