Adds fathom analytics - Githubissues

Description

Please provide a brief description of the changes made in this pull request. Mention any relevant issues.

Adds fathom analytics client to apps/sample-ui

Describe the testing performed to ensure the changes are working as expected.

Please check the following items before submitting your pull request:

[x] My code follows the project's coding style guidelines.
[x] I have added appropriate comments to my code, particularly in the technical, low-level, or subtle sections.
[x] I have updated the documentation (if applicable) to reflect the changes made.
[x] My changes do not introduce any new warnings or errors.
[x] I have reviewed my own code and ensured its quality.
[x] I have added unit tests (if applicable) to cover the new changes, and no old unit tests fail.

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