Add `integrations.github` to `atmos.yaml` @aknysh (#538)
what
- Add
integrations.githubtoatmos.yaml - Don't search and process stacks when executing
atmos describe configcommand
why
integrations.githubis a free-form map section that can be used to define any configuration for GitHub (e.g. GitHub Actions). It's returned by the commandatmos describe config(https://atmos.tools/cli/commands/describe/config)