Post Reactions: Show appreciation to posts through emoji reactions

[GraemeFulton]

Now the platform has post reactions, where you can show appreciation to posts through different emoji reactions. Here's a demo:
https://github.com/Prototypr/prototypr-frontend/assets/4354786/858e76d7-3fe6-4a42-bb19-af65868af93a

To make this possible, on the Strapi backend, I added a 'Likes' collection using the Strapi admin dashboard, which is set up like this:

How it works:

Strapi:

• Like Content type: Following this stackoverflow answer, I made 'Likes' it's own collection, with a relation to 'user' and 'post'.
• Emoji booleans: I set up each emoji as it's own field, so each reaction can be toggled on or off (rather than an Enumeration because that would mean you can only choose one of the reactions
• Total likes: There's a total count number which stores the sum of all the likes, so each user can lead to more than 1 like in total.
• TotalCount field: A totalCount field was added to the posts collection (see here by extending the post schema with a resolver that will add up all the total likes - that number makes it easy for sorting by popularity later
• Policies: the policies added ensure multiple like entries cannot be created by the same user on the same post

Next app:

• Like component: a new component that fetches the likes etc using graphql endpoint
• Clear cloudflare cache: When the user likes a post, the cache is cleared for that page using a strapi webhook that pings the next api endpoint for revalidating the post and clearing the cache
• Load likes on page load: in the page, the likes are still not always up to date due to browser cache, so the data is loaded in the like component so the count is up to date

Next steps

• tidy up the UI (1 heart button, and open the reactions)
• add likes to the cards on the toolbox archive page (prototypr.io/toolbox)
• add likes to articles, not just tools