docs: cart examples

[carpad88]

Types of changes

• [ ] Bug fix (a non-breaking change which fixes an issue)
• [x] New feature (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description

I added some examples on the docs to manage Medusa cart initialization by using localstorage and cookies on client side, or cookies on server side.

Medusa's cart object can get very complex once users start adding products or items to it. Saving all that information in localstorage can become a nightmare. A better approach is to save only the cart_id. Later on, users can use the cart_id to retrieve the cart information using nuxt-medusa module.

This PR is related to #15.

Checklist:

• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes (if not applicable, please state why)

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Name	Status	Preview	Comments	Updated (UTC)
nuxt-medusa	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 14, 2023 5:41am

[Baroshem]

Hey,

Thanks so much for this!

I will take a look in the upcoming hours and release it to the docs :)