Add link to app privacy policy

[esteban-gs]

We need to add a link our privacy policy which is currently hosted in github: https://github.com/savagelearning/Machete/wiki/privacy-policy .

This change is primarily to comply with Meta's privacy policy requirement found here: https://developers.facebook.com/terms/dfc_platform_terms/#privacypolicy

It mentions that it should be generally accessible, so my guess is that we can add a link on the app footer.

Acceptance criteria:

• We have a globally accessible link to our privacy policy that links to the github wiki link above on a separate browser tab,
• We have a privacy link on the login cshtml page

[Agniv25]

Hi I want to work on this issue

[Massa-Albani4]

can i work on this?