Add more lifecycle hooks

### Is your proposal related to a problem?
Currently it is hard to hook into hasura's execution pipeline. Only option now is the authentication hook, however it is limited and not always necessary (using JWT).

### Describe the solution you'd like
More possible hooks to be added to hook into the execution of the graphql queries/mutations
A good starting point is to have these kind of hooks: https://github.com/mercurius-js/mercurius/blob/master/docs/hooks.md#preexecution, especially the pre-execute hook seems useful. You can do several things such as query cost calculation, caching, rejecting query, extending the query, validate mutation input etc

### Describe alternatives you've considered
Using a reverse graphql proxy (e.g. fastify mercurius) with own schema stitching

### If the feature is approved, would you be willing to submit a PR?
My understanding of haskell is little to none, perhaps if people could help out?