[feature-request] Events Filterbar support

[kidunot89]

Summary

Add support for Events Filterbar support on the events connection.

E.g

query {
  events(first: 10, after: "*", where: {
    eventCategory: "Concert",
    cost: "25.99"
    tags: ["classical"],
    venues: ["Rex Theater"],
    day: "",
    time: "",
    country: "US",
    city: "Pittsburgh"
  }) {
    id
  }
}