Dashboard: SBOM Metrics

### Current Behavior

We currently have no option to see how many `SBOM's` consumed/processed on the dashboard.

### Proposed Behavior

We do have notification channel integration that sends events about `BOM_PROCESSED` and `BOM_CONSUMED` but we don't have a tile on the Dashboard showing `TOTAL BOM CONSUMED`

If we could add Two tiles (Shown below) on the dashboard that will help users to understand how many SBOM's are generated/imported till date as well as the recent SBOM's information on the dashboard.

- Total BOM Consumed
- Recently Imported SBOM's

### 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