docs: adds httpErrorHandled example and integration test for HttpError

[karel-rehor]

Proposed Changes

• Add an example of using recently added HttpError type
• Add an extra integration test working with this type

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• yarn test completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[alespour]

Nice example. I think it should make a CHANGELOG entry.

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All modified and coverable lines are covered by tests ✅

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  Coverage   100.00%   100.00%           
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  Files           35        35           
  Lines         1449      1449           
  Branches       344       344           
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  Hits          1449      1449           

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[alespour]

Nice example!