Change donation modal to render also in `/donate` path

[orlando]

Right now we have the donation form to render in /#donate, we need to make the route /donate in the tools application to render the Donation modal.

Acceptance criteria

• /donate path in the tools should render the donation form.

[orlando]

https://debtcollective.org/donate, https://tools.debtcollective.org/donate and https://community.debtcollective.org/donate now point to https://tools.debtcollective.org/?donate

@annlarson we can use https://debtcollective.org/donate from now on