docs: Write overview page for the developing section

[christopher-hakkaart]

Summary

sites/docs/src/content/docs/developing/overview.md (line 8) needs a written overview page. See other overview pages in the docs for examples.

File

sites/docs/src/content/docs/developing/overview.md

[christopher-hakkaart]

Please make any PRs for this issue against the docs-v2 branch. Your PR will be reviewed by Chris or James. Thank you for your contribution!

[jess789550]

I'm going to move external-uses.md from pipelines to developing so this link will need to be changed in future FYI