add offset support in cursor pagination for nestjs-query

nestjs-query-graphql.hotfix.ts

import { applyDecorators } from '@nestjs/common';
import { Field, Int } from '@nestjs/graphql';
import { CursorPagingType } from '@ptc-org/nestjs-query-graphql';
import { LimitOffsetPagerStrategy } from '@ptc-org/nestjs-query-graphql/src/types/connection/cursor/pager/strategies';
import { getOrCreateCursorPagingType } from '@ptc-org/nestjs-query-graphql/src/types/query/paging';
import { CannotUseWith } from '@ptc-org/nestjs-query-graphql/src/types/validators';
import { IsOptional, Min, Validate } from 'class-validator';

const CPT = getOrCreateCursorPagingType();

applyDecorators(
  Field(() => Int, { nullable: true, description: 'Paginate offset (added by hotfix)' }),
  IsOptional(),
  Validate(CannotUseWith, ['after', 'before']),
  Min(0),
)(CPT.prototype, 'offset');

// @ts-ignore
const getOffset = LimitOffsetPagerStrategy.prototype.getOffset;
// @ts-ignore
LimitOffsetPagerStrategy.prototype.getOffset = function (cursor: CursorPagingType) {
  return cursor.offset ?? getOffset.call(this, cursor);
};