wip: easypost integration

[edyespinal]

What problem is this solving?

Integration with easypost in order to create a return label.

How to test it?

Workspace

@edyespinal I couldn't tag you because you are a participant. Please take a look if you have time

[vtex-io-ci-cd]

Hi! I'm VTEX IO CI/CD Bot and I'll be helping you to publish your app! 🤖

Please select which version do you want to release:

• Patch (backwards-compatible bug fixes)

• Minor (backwards-compatible functionality)

• Major (incompatible API changes)

And then you just need to merge your PR when you are ready! There is no need to create a release commit/tag.

• No thanks, I would rather do it manually 😞

[vtex-io-docs-bot]

Beep boop 🤖

I noticed you didn't make any changes at the docs/ folder

• There's nothing new to document 🤔
• I'll do it later 😞

In order to keep track, I'll create an issue if you decide now is not a good time

• I just updated 🎉🎉

[filafb]

@edyespinal @zekivtex Nice work! I added a couple of suggestions. Also, I didn't see anything on the store side. I think it would be nice to allow the store user to see the label in the interface.

[filafb]

Nice refactor! The ReturnLabel component is way easier to read now! I added two comments to get your thoughts on them.

[filafb]

This key coming from MD and mapped on schema.json under masterdata builder is called returnLabel. In order to be consistent we should either change how we are saving it on masterdata or how we are declaring it on schema. I think the first one is the preferred one since, since changing schema on md can have side effects in the indexation process.

[filafb]

Should we check if the settings has value? What does it return when the app is not installed?