Upload documentation and Zip packages after commits or pull requests

[ ] Decide where the Zip packages and the web pages get uploaded
[ ] Set up github secrets with the auth information
[ ] In the action script, if the repository is not the ddialliance one, do not publish
- This is so forks of the repository do not attempt to upload
[ ] Upload the sphinx build and Zip packages to a subfolder of the web space
- For non-tagged commits and pull requests, use the commit hash as the directory
- For tagged commits, use the tag as the directory name
[ ] Add an index entry to the index page
[ ] When a pull request is merged or closed, delete that commit's directory

ddialliance / ddimodel