feat(content-security-policies): add nonce and trusted types support

[lsagetlethias]

• add nonce support except for Next.js Pages Dir
• add trusted types support
• linked doc change request : https://react-dsfr.codegouv.studio/~/changes/qQlH6EWaIiyp39WwEyKF/content-security-policy

[garronej]

Thanks a lot for the changes. I'll merge later today

[lsagetlethias]

Thanks a lot for the changes. I'll merge later today

Thanks! Also, I tagged you as reviewer on the documentation changes on GitBook

[garronej]

Okay, there were a few things to tweak:

• `${undefined}` === "undefined" (and not "").
• Internal functions should have all parameters set as required. This ensures we don't overlook anything and apply defaults only once, universally. Only external API should have optional params.
• The tools directory is intended for self-contained utilities that solve generic problems. Not a misc dir.

Other than that, everything looks good. Thank you again for your diligent work.