docs(quarto): Tidy up & address Quarto-rendered formatting for first Pages deployment

[lukeroantreeONS]

📌 Tidy up & address Quarto-rendered formatting for first Pages deployment

✨ Summary

Address outdated / missing documentation information and (quarto-rendered) formatting ahead of first Pages deployment.
Scope determined in Excel spreadsheet.

📜 Changes Introduced

• docs(hooks): Demo notebook updated - install instructions removed, table reformatted

✅ Checklist

Please confirm you've completed these checks before requesting a review.

• Code passes linting with Ruff
• Security checks pass using Bandit
• API and Unit tests are written and pass using pytest
• Terraform files (if applicable) follow best practices and have been validated (terraform fmt & terraform validate)
• DocStrings follow Google-style and are added as per Pylint recommendations
• Documentation has been updated if needed

🔍 How to Test

Ensure the quarto application is installed locally, then run the following from the repo root directory;

uv run quartodoc build
uv run quarto render
uv run quarto preview

Go section by section, checking the issues noted in the spreadsheet are resolved to satisfaction.

[rileyok-ons]

Changes mainly look much better, got a few updates to the servers and got a formatting issue with the new preprocessing hook table

[frayle-ons]

A few things to check

[rileyok-ons]

Unless anyone can see anything else I'm good with this. looks robust