Use local logo file instead of external GitHub avatar URL

[Copilot]

Documentation was referencing the organization logo via GitHub's avatar API, creating an external dependency. Changed to use the local logo file added in main branch.

Changes

• Moved StonerLogo2.png to docs/_static/ directory (Sphinx convention for static assets)
• Updated docs/conf.py: html_logo now points to _static/StonerLogo2.png instead of https://avatars.githubusercontent.com/stonerlab

The logo now ships with the documentation build artifacts, eliminating the external dependency and ensuring consistent availability.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• docs.python.org
  • Triggering command: /home/REDACTED/.local/bin/sphinx-build sphinx-build -M html . _build (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Can we switch to using the sphinx better theme (available via conda on the phygbu channel or via pip) for the documentation. Also use the organisation logo for documentation logo, finally change the URL in the README for documentation to reflect the corrent github url for the positiory's github pages.

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