1st Iteration: Anti-Harassment Policy

In this MR:

1. Adding policy in it's current entirety
2. Created a link from the handbook index page under General

Next MR (w/c 10 July):

1. Abby to review and harmonize (where possible) country specific regulations from the Netherlands and Belgium and add an addendum/link from this policy to those if necessary. (the current policy meets UK and India requirements)
2. Add California specific requirements, including publishing a link to a pamphlet.

Once 2nd MR is completed and merged, announce on team call and roll out Grovo training. All California based team members must acknowledge having read the policy and taken the training.

Cc @gl-peopleops @pmachle