[Docs] Add documentation for typeorm

[Sfurti-yb]

Changes to include CRUD example for typeORM

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✅ ddhodge
❌ Sfurti Sarah

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[alumni]

There's no need to use an old version of ECMAScript. You can use whatever you would like.

TypeORM currently ships compiled to ES2021 (but that will be increased in the next version), so using something older is not really necessary.

The important thing about tsconfig is:

{
  "experimentalDecorators": true,
  "emitDecoratorMetadata": true
}

FYI: We (TypeORM maintainers) are in the processes of rewriting our docs. The docs for the initial setup which were copied here could be re-written to take advantage of more modern JS features (we'll update them in the near future). The current instructions should still work though.

[Sfurti-yb]

Thanks @alumni for the review, will make the changes accordingly

[ddhodge]

I'm not sure what this page is for actually - it is commented out