Overview Panel for Insights dashboard

- [ ] Discuss and finalize what info graphics we want in the Overview Panel in order to finalize the fields for related models and endpoints

This panel will overview/summarize the insights. Kindly leave your thoughts and recommend other charts you may have in mind in the comments.

Draft List:
1. `KPI Cards` - Shows the count and delta of key metrics
- Total Advisories
- Total Packages
- Total Data Sources

2. `SBar chart: 30-day daily advisory ingest trend
- Shows growth of the database over time.

3. `Bar chart`: Advisories of the last 10 years as per `date_published`
Ref: https://www.cvedetails.com/browse-by-date.php

4. `Coverage Comparison`
Shows the building blocks of VCIO