chore(rebranding): removing platform references

[jherey]

Summary

This PR follows the rebranding effort from the Docs team and applying them in the Node.js SDK. Details here. Docs PR

Description

• Removed references to "platform"
• Removed references to just "commercetools"

Todo

• Tests
  • [ ] Unit
  • [ ] Integration
  • [ ] Acceptance
• [ ] Documentation
• [x] Type label for the PR

[changeset-bot[bot]]

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Latest commit: aaabedab1e2853b51a2689a8dbaa898cd1ac1752

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