Add Debian ecosystem for version management

### Current Behavior

Currently, there is no way of being alerted to an out-of-date version of a debian component, since no current repository can manage them.

### Proposed Behavior

The idea would therefore be to add a debian ecosystem, with the default public repository, see Debian API documentation: https://sources.debian.org/doc/api/.

In this way, a component with a PURL in the format: pkg:debian/PACKAGE@VERSION will be analyzed to detect a possible available update.

### Checklist

- [X] I have read and understand the [contributing guidelines](https://github.com/DependencyTrack/dependency-track/blob/master/CONTRIBUTING.md#filing-issues)
- [X] I have checked the [existing issues](https://github.com/DependencyTrack/dependency-track/issues) for whether this enhancement was already requested