[Donation] Add "Ways to Give" tab to Donation page

Half inspired by https://mitchellh.com/writing/ghostty-non-profit

Talk with Mel to get copy for this. Also, have a download PDF button somewhere in the HCB dashboard so organizers can share it directly with a donor.

First confirm the donation copy with Mel, as requested in the issue. Then locate the Donation page and the HCB dashboard entry points; the work is done when the page has a Ways to Give tab and organizers can access a downloadable PDF to share with donors.

Written by the indexing model from the issue text.