Allow for early return in beforeOperation hooks + implementation

[r1tsuu]

Proposal: allow for early return in beforeOperation hooks.
Why? There are several possible usages:

1. Caching plugin.
2. Collections / Globals, that aren't depend on the Payload database could be a thing. You just need to implement how operations (find, update etc.) will iteract with your data storage and you'll have a free admin UI for them, as well you don't need to sync anything.

Of course, it's up to us to make sure that returned data is correct.

Usage:

import { beforeOperationReturn } from 'payload'

export const Tests: CollectionConfig = {
  fields: [],
  hooks: {
    beforeOperation: [
      ({ operation }) => {
        if (operation === 'read') beforeOperationReturn([])
      },
    ],
  },
  slug: 'tests',
};

Possible implementation:

class BeforeOperationEarlyReturn extends Error {
  data: unknown;
  constructor(data: unknown) {
    super();
    this.data = data;
  }
}

export const beforeOperationReturn = (value: unknown): never => {
  throw new BeforeOperationEarlyReturn(value);
};

// In operations

// /////////////////////////////////////
// beforeOperation - Collection
// /////////////////////////////////////

try {
  await args.collection.config.hooks.beforeOperation.reduce(async (priorHook, hook) => {
    await priorHook;

    args =
      (await hook({
        args,
        collection: args.collection.config,
        context: args.req.context,
        operation: 'read',
        req: args.req,
      })) || args;
  }, Promise.resolve());
} catch (e) {
  if (e instanceof BeforeOperationEarlyReturn) return e.data;
  throw e;
}

Pros:

1. Seems elegant, something like Next.js does with notFound and redirect. Well, they actually do the same https://github.com/vercel/next.js/blob/5c9706ed1f5199b135dab850100e199f76d6a0a1/packages/next/src/client/components/not-found.ts#L21
2. Doesn't break that currently beforeOperation return value is used to modify operation args.

Cons:

1. Error throwing usage.