Add developing with codesandbox docs

What does this MR do?

This MR adds docs for developing with local Codesandbox that was discovered while working on this epic.

Does this MR meet the acceptance criteria?

Conformity

• [ ] Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

References

• Related to #250384 (closed)