chore: allow configuration of loaded mapping libraries on the development page

[JamesLMilner]

Description of Changes

This PR allows the development page to be configurable in terms of which mapping library examples are initialised/rendered.

Link to Issue

281

PR Checklist

• [x] The PR title follows the conventional commit standard
• [x] There is a associated GitHub issue
• [ ] If I have added significant code changes, there are relevant tests
• [x] If there are behaviour changes these are documented