Cross-link getting started development docs
What does this Merge Request do?
Cross-link getting started development docs that were added in gitlab-pages!335 (merged)
Merge Request checklist
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Tests added for new functionality. If not, please raise Issue to follow-up.
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This change is backward compatible. If not, please include steps to communicate to our users.
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Documentation added/updated, if needed.~~ 
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gdk doctortest added, if needed.