chore: move lambda files to repo

[coelhucas]

Move lambda files (redirects, CSP) to the public repository so all changes can be made from here instead

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[github-actions]

Allow 10 minutes from last push for the staging site to build. If the link doesn't work, try using incognito mode instead. For internal reviewers, check web-documentation repo actions for staging build status. Link to build for this PR: http://docs-dev.timescale.com/docs-chore-lambda-files

[billy-the-fish]

hi @coelhucas , looks great. Is there a way for me to test this, or do I show faith :-).

[coelhucas]

Hey @billy-the-fish, not yet! I do have to add some changes both here and on the original repo before we can move on with this 🙂