Enhance Github Workflows

[a-hassanin]

This PR incorporate feedback from #290 (comment)

In addition to some details:

• add dependabot.yml to find any outdated GitHub Actions
• add .golangci.yml increasing the timeout to 3m for the windows-runners
• For the go work flow: replace shell steps with separate unit and integration tests
• Make the ruby and go workflows run only when changes are made into the corresponding source folders
• Enable workflow_dispatch to allow manual triggering of the workflow actions
• Enable on-push workflows only on the master branch to avoid multiple redundant runs on a pull request