Merge changes from shared docs repo

[gcapes]

Fix #861

However, I noticed that the hpcflow package name is dislayed as hpcflow.app rather thanhpcflow. This is different to the matflow docs, and indeed the command line application is called hpcflow rather than hpcflow.app.

This name is set in config.jsonc, but updating package to hcpflow breaks the build:

$ make html
Running Sphinx v7.4.7

Configuration error:
There is a programmable error in your configuration file:

Traceback (most recent call last):
  File "/home/mbexegc2/projects/lightform/hpcflow-new/.venv/lib/python3.12/site-packages/sphinx/config.py", line 529, in eval_config_file
    exec(code, namespace)  # NoQA: S102
    ^^^^^^^^^^^^^^^^^^^^^
  File "/home/mbexegc2/projects/lightform/hpcflow-new/docs/source/conf.py", line 213, in <module>
    release = app.version
              ^^^^^^^^^^^
AttributeError: module 'hpcflow' has no attribute 'version'. Did you mean: '_version'?

make: *** [Makefile:20: html] Error 2

MatFlow doesn't have this problem. @aplowman could you advise how to fix this?