Chunk of refactors and error handling

[lkostrowski]

Scope of the PR

1. Refactor services
2. Implement error handling
3. Bunch of tests

Next steps:

1. PR with Tests for use-case (main business component)
2. PR with logger overhaul

Related issues

Checklist

• I added changesets and read good practices.

[changeset-bot]

⚠️ No Changeset found

Latest commit: f17a2cb

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
saleor-app-avatax	🛑 Canceled (Inspect)			May 13, 2024 7:59pm
saleor-app-cms	🛑 Canceled (Inspect)			May 13, 2024 7:59pm
saleor-app-crm	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-data-importer	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-emails-and-messages	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-invoices	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-klaviyo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-products-feed	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-search	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 13, 2024 7:59pm
saleor-app-segment	🛑 Canceled (Inspect)			May 13, 2024 7:59pm
saleor-app-slack	🛑 Canceled (Inspect)			May 13, 2024 7:59pm
saleor-app-smtp	🛑 Canceled (Inspect)		💬 Add feedback	May 13, 2024 7:59pm