As a frontend user of the charities graph API, I would like the option of subscriptions instead of queries for pulling charity info items

[conorheffron]

As a frontend user of the charities graph API, I would like the option of subscriptions instead of queries for pulling charity info items.

• New items from mutations etc should allow render of /donate items/carousel without a hard page refresh.
• Schema update needed.

See official doc for possible approach here -> https://graphql.org/learn/subscriptions/