Feature Addition: Filter by Data Sources

[vynttran]

• Resolves feature request in Feature request: filter on ATT&CK data sources #608
• Description: With this new addition, the filter menu dropdown would have not just the filter by platforms section, but also a filter by data sources section.
• Implementation: As a search based on data sources feature already exists in the current version of the Navigator, we built this addition based off of that, which should ensure the technique-to-source mappings are accurate, and so is this added filtering functionality. Below is a screenshot of what the addition would look like:

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[clemiller]

Hi all, please ping me when this PR is ready for review and I will take a look. Thanks!

[clemiller]

Thanks for opening this draft and exploring a data source filter for the Navigator. Since the v18 release (October 2025), data sources have been deprecated and are no longer part of the current model, so we’re not adding new data source-based features. With that in mind, we’ll be closing this PR. Thanks again for the work you put into it.