Setup code climate and maintain score of A

[fryorcraken]

This is a change request

Problem

Technical debt (as measured by static analysis) is slowly creeping up since drastic improvements in end of 2022: https://codeclimate.com/github/waku-org/js-waku/trends/technical_debt

Code Climate provide good thumb of rules around code readability and redundancy, which are criteria that can impact delivery speed and bundle size.

Proposed Solutions

• Setup codeclimate to review PRs.
• Increase maintainability to rating A

Notes

[danisharora099]

a rating of A can be part of iterative PRs