Plugins

[d-exclaimation]

Is your feature request related to a problem? Please describe.
Validation rules works great for validation GraphQL parsed query, but doesn't give full extends in how Pioneer works. Having a plugin system that allow user to intercept certain process of Pioneer could be really beneficial

Describe the solution you'd like
A plugin system similar to @apollo/server or graphql-yoga, It doesn't have to immediately support intercepting process and modifying responses yet, but it should somewhat works over websocket

Additional context

• https://www.apollographql.com/docs/apollo-server/integrations/plugins
• https://the-guild.dev/graphql/yoga-server/docs/features/envelop-plugins