Improve parsing addresses

[anxolin]

Improves parsing logic of the list of token addresses for the balance endpoints (makes some validations, refactors, and return only unique values).

Adds also tests

Context

Before merging #164 threre's some minor PRs for cleaning up

Test

Run nx test shared

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[socket-security]

No dependency changes detected. Learn more about Socket for GitHub.

👍 No dependency changes detected in pull request

[anxolin]

Consolidating all PRs in #164