Add basic workflows

[gbernady]

Changelog:

• Added build workflow to verify the project build in and after each code change.
• Added CodeQL workflow to scan the project for known vulnerabilities.
• Added dependabot.
• Added golangci-lint with make lint target and some standard configuration that we can adjust later.
• Updated Makefile to be more in line with standard Go projects.
• Updated README to include basic badges (build status and score card).

Lint currently fails on numerous errors, so make lint is commented out in the build workflow.

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.