Include project in requirements-doc.txt

[tp832944]

PR Type

• Build related changes
• CI related changes

Description

Required for compiling Jupyter notebooks into ReadTheDocs, should we wish to do that in future.

How Has This Been Tested?

Pre-commit makes required edit.

New tests introduced with this change verify that...

Does this PR introduce a breaking change?

No

Checklist before requesting a review

• I have made sure that my PR is not a duplicate.
• My code follows the style guidelines of this project.
• I have ensured my code is easy to understand, including docstrings and comments where necessary.
• I have performed a self-review of my code.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.
• I have updated CHANGELOG.md, if appropriate.

[github-actions]

Performance review

Commit f0272ce - Merge 2c90394 into 183ed42

No significant changes to performance.