[WIP] feat: introduce graphql for events

[mattlindsey]

fixes #66
Add GraphQL interface using work done earlier by @mattwr18.
Try a query like this from localhost:3000/graphiql:
{
events {
id
duration
name
}
}

• Tests all green tests and all builds passes 💚
• PR well-named, issue linked 📎 and no merge conflicts.
• Request review from other contributors

Screenshots(if appropriate)

[aonomike]

Looks great to me. Thanks @mattlindsey @mattwr18