Feat: support custom brands handling in Documentation and Integration

[RobinTail]

Based on #1470 and thanks to #1730

This will be a feature in v19.
I'd like to keep changes of 19.0.0 smaller, making it easier to migrate.
Thus, I'm going to separate breaking changes from features and release this as 19.1.0.

This will be the interface:

import { z } from "zod";
import { Documentation, Integration } from "express-zod-api";

const myBrand = Symbol("MamaToldMeImSpecial"); // I highly recommend using symbols for this purpose
const myBrandedSchema = z.string().brand(myBrand);

new Documentation({
  /* config, routing, title, version */
  brandHandling: {
    [myBrand]: (
      schema: typeof myBrandedSchema, // you should assign type yourself
      { next, path, method, isResponse }, // handle a nested schema using next()
    ) => {
      const defaultResult = next(schema.unwrap()); // { type: string }
      return { summary: "Special type of data" };
    },
  },
});

import ts from "typescript";
const { factory: f } = ts;

new Integration({
  /* routing */
  brandHandling: {
    [myBrand]: (
      schema: typeof myBrandedSchema, // you should assign type yourself
      { next, isResponse, serializer }, // handle a nested schema using next()
    ) => f.createKeywordTypeNode(ts.SyntaxKind.BooleanKeyword),
  },
});

[coveralls-official]

coverage: 100.0%. remained the same
when pulling 3c93150 on feat-support-custom-schema
into 38e157c on master.

[RobinTail]

THIS is getting so neat!

[RobinTail]

ready

[RobinTail]

ready now