Fix `quarto` `GitHubAction` `ci`

[griff-rees]

Fix quarto doc deploy via GitHubActions. Note this doesn't include a page for download links yet, just solving the basic technical issues. At the moment it's directly updating https://alan-turing-institute.github.io/clim-recal so you can check from there. I think there's various things out of date. I've removed the workflow pipeline diagram which had rendering errors and is out of date.

@RuthBowyer or @andrewphilipsmith: if you'd like to try it out locally you can use:

$ cd path/to/your/checkout/of/clim-recal
$ docker compose build docs
$ docker compose docs up

Of if you've got quarto installed locally by installing quartodoc via pip.

$ cd path/to/your/checkout/of/clim-recal
$ pip install quartodoc  
$ quartodoc build
$ quarto preview

Other options for quartodoc include:

• Install dependencies in pyproject.toml via pdm in the python folder, then using a virtual env via https://pdm-project.org/latest/usage/venv/#create-a-virtualenv-yourself
• conda create -f environment.yml -n clim-recal && conda activate clim-recal && quartodoc build