Prioritise homepage content to align with top 10 Dev Proxy developer scenarios (#42)

* Initial plan

* Prioritise homepage content to align with top 10 Dev Proxy developer scenarios

Co-authored-by: garrytrinder <11563347+garrytrinder@users.noreply.github.com>

* Fix HTML entity in AI/LLM heading per code review

Co-authored-by: garrytrinder <11563347+garrytrinder@users.noreply.github.com>

* Refactor Dev Proxy output for improved clarity and update links to OpenAI documentation

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: garrytrinder <11563347+garrytrinder@users.noreply.github.com>
Co-authored-by: Garry Trinder <garry@trinder365.co.uk>

Author: Copilot