chore: setup golangci-lint

[darrenvechain]

Description

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

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• Test A
• Test B

Test Configuration:

• Go Version:
• Hardware:
• Docker Version:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• New and existing E2E tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have not added any vulnerable dependencies to my code

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PR-Codex overview

This PR focuses on adding linting configuration and workflow for code linting using golangci-lint.

Detailed summary

• Added .golangci.yml file with linting configuration settings.
• Added lint-go.yaml workflow file for running golangci-lint on push and pull request events.
• Updated CONTRIBUTING.md file with information about code linting using golangci-lint.

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