chore: switch from golint to golangci-lint

[tekenstam]

Overview

This PR implements the changes described in issue #464 to migrate from the deprecated golint to the more modern golangci-lint tool.

Changes

• Added a minimal .golangci.yml configuration file with essential linters
• Updated the Makefile to use golangci-lint instead of golint
• Modified the GitHub workflow to install and run golangci-lint
• Made linting errors non-blocking initially to allow for a gradual transition

Approach

This implementation takes a gradual approach to the migration:

1. Linting errors are reported but don't fail builds during the transition
2. Only a minimal set of linters is enabled initially (govet, gosimple, ineffassign)
3. The infrastructure is in place to enable more linters in future PRs

Testing

• Verified that the linting command works correctly locally
• Confirmed that the linting step in CI won't break existing workflows

Checklist

• I have signed my commits with git commit -s for DCO
• I have added tests that prove my fix is effective or that my feature works
• I have added documentation needed for others to understand my changes

Fixes #464

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.99%. Comparing base (a3d330a) to head (5bfff33).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #465   +/-   ##
=======================================
  Coverage   44.99%   44.99%           
=======================================
  Files          40       40           
  Lines        7017     7017           
=======================================
  Hits         3157     3157           
  Misses       3711     3711           
  Partials      149      149           

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