Add dynamoose-decorator for support typescript schema

[changmyeong]

Summary: Adding dynamoose-decorator for support typescript schema

Code sample:

Schema

import { Item } from 'dynamoose/dist/Item';
import {
  HashKey,
  Attribute,
  Required,
  Index,
  CreatedAt,
  UpdatedAt,
  Model,
  Storage,
  getModel,
} from 'dynamoose-decorator';

@Model({ throughput: 'ON_DEMAND', waitForActive: false })
class User extends Item {
  @HashKey()
  @Attribute()
  id: string;

  @Index({ name: 'emailIndex' })
  @Required()
  @Attribute()
  email: string;

  @Index({ name: 'nameIndex' })
  @Required()
  @Attribute()
  name: string;

  @Index({ name: 'companyAndScoreIndex', rangeKey: 'score' })
  @Attribute()
  company: string;

  @Attribute()
  score: number;

  @Storage('milliseconds')
  @CreatedAt()
  @Attribute()
  createdAt: Date;

  @Storage('milliseconds')
  @UpdatedAt()
  @Attribute()
  updatedAt: Date;
}

Model

const UserModel = getModel(User)

Usage

const user = new UserModel();
user.id = 'bf02318d-4029-4474-a7a0-e957eb176d75';
user.email = 'test@dynamoose.com';
user.name = 'DYNAMOOSE';
user.company = 'Amazon';
user.score = 3;

await user.save();

GitHub linked issue:

Discussions: #1656

Other information:

Type (select 1):

• Bug fix
• Feature implementation
• Documentation improvement
• Testing improvement

• Test added to report bug (GitHub issue #---- @---)
• Something not listed here

Is this a breaking change? (select 1):

• 🚨 YES 🚨
• No
• I'm not sure

Is this ready to be merged into Dynamoose? (select 1):

• Yes
• No

Are all the tests currently passing on this PR? (select 1):

• Yes
• No

Other:

• I have read through and followed the Contributing Guidelines
• I have searched through the GitHub pull requests to ensure this PR has not already been submitted
• I have updated the Dynamoose documentation (if required) given the changes I made
• I have added/updated the Dynamoose test cases (if required) given the changes I made
• I agree that all changes made in this pull request may be distributed and are made available in accordance with the Dynamoose license
• All of my commits and commit messages are detailed, explain what changes were made, and are easy to follow and understand
• I have filled out all fields above

[github-actions]

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[changmyeong]

I dedicate any and all copyright interest in this software to the public domain. I make this dedication for the benefit of the public at large and to the detriment of my heirs and successors. I intend this dedication to be an overt act of relinquishment in perpetuity of all present and future rights to this software under copyright law.

[github-actions]

This pull request is stale because it has been open 7 days with no activity. Remove stale label or comment or this will be closed in 3 days.

[fishcharlie]

Closing in favor of 1e5b220. This PR heavily indicates that Dynamoose endorses dynamoose-decorator, which isn't the case. So I decided to go in favor of the option discussed with creating a new page for these resources. Since it is a 3rd party resource a separate page seems appropriate. I don't want users to get confused and think that dynamoose-decorator is part of Dynamoose itself or anything like that.