Add Family and Friends Day to the handbook

Why is this change being made?

This adds the Family and Friends Day initiative to the handbook and adds the preliminary FAQ. We can continue to add answers as questions pop up.

Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what