Create resource to sync Foreman and Git

## Need

```gherkin
As a developer
I want to write a daemon which will sync Foreman with the Git repository
So that the two resources are up to date without any user input need
```

## Deliverables

-  a sync command which will update the Git repository with the latest Foreman configuration
- ~~create a cron which will read from the settings file its configs, and run the command. The cron will be handled by the Foregit daemon~~
- hammer-cli

## Solution

#### Prerequisites
- [required dependency for identifying the problem, scope and then solution for this issue]

#### TODO
- [x] Add a `sync` command to download resources from Foreman and save them as files in the Git repository
- [x] The command can receive CLI params
- [x] Update foregit.rb with require https://github.com/theforeman/hammer-cli-foreman/blob/master/lib/hammer_cli_foreman.rb

#### Files
- lib/sync.rb