v2 lightning docs: security considerations for devpt

[aleksa-krolls]

Request

In the new v2 docs section Build Workflows - For Developers, we want to add/refresh the following docs pages:

• Security considerations for developers (see page docs/build-for-developers/security-for-devs.md)

If you have any comments or ideas for new pages, please leave notes in the docs Information Architecture sheet.

For review

Create a new branch off of main and draft a PR with these changes for review. Assign to me when ready for review.

Resources

Before you start work, please review Nick's thoughts on how to write docs.

See the Docs Style Guide for other guidance when writing in markdown.