fix(logger): correctly export LogFormatter

[dreamorosi]

Description of your changes

This PR aims at resolving the issue highlighted in #393 that prevented customers to use LogFormatter (from Logger) as described in the docs.

How to verify this change

Build the utility with npm pack & install it in other project/examples, then try to use to see exported class.

See below:

Related issues, RFCs

#393

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• The code coverage hasn't decreased
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published in downstream module
• The PR title follows the conventional commit semantics

Breaking change checklist

N/A

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.