[FEATURE] Enable nlreturn linter

[kashifkhan0771]

Feature Description

Enable the nlreturn linter in .golangci.yaml and address all identified issues by make lint afterwards.

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Use Case

Enabling the nlreturn linter ensures return statements are followed by a newline for better readability.

Proposed Solution

Enable nlreturn in .golangci.yaml file and run make lint

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Additional Context

N/A

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Pseudo Code

In .golangci.yaml

  enable:
    - govet
    - staticcheck
    - errcheck
    - nlreturn