chore(ust-1435): sdk methods custom config, docs

[lukasborawski]

🔗 Linked issue

UST-1435

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSDoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR provides extensibility for SDK types of methods custom configuration. Additionally updating documentation.

📝 Checklist

• [ ] I have linked an issue or discussion.
• [x] I have updated the documentation accordingly.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: db3a7f58967aa05b2ec74d9bc98609343a02cfbf

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@vue-storefront/nuxt	Minor
@vue-storefront/next	Minor
@vue-storefront/sdk	Minor

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