Add documentation for construct authoring

[DanielMSchmidt]

trafficstars

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment

Description

We have little docs to link to for folks who want to explore building constructs. We should have docs mentioning

• the projen template
• best practices for creating shared constructs
• hybrid constructs

References