Make property title expansion optional

[ethanpmullen]

This adds the option to make property title expansion optional, i.e. this schema:

export const input = {
  title: 'Example Schema',
  type: 'object',
  properties: {
    firstName: {
      title: 'First Name',
      type: 'string',
    },
    lastName: {
      title: 'Last Name',
      id: 'lastName',
      type: 'string',
    }
  },
  required: ['firstName', 'lastName'],
}

Will produce this type:

export interface ExampleSchema {
      firstName: string;
      lastName: string;
      [k: string]: unknown;
}

Instead of this type:

export type FirstName = string;

export type LastName = string;

export interface ExampleSchema {
      firstName: FirstName;
      lastName: LastName;
      [k: string]: unknown;
}