feat: Add SARIF format reporting for CI/CD integration

[hellonico]

Summary

This PR introduces support for the SARIF (Static Analysis Results Interchange Format) output format.

By adding the --output sarif flag (or sarif to the .xeol.yaml config), users can now seamlessly integrate Xeol's End-of-Life dependency findings directly into modern CI/CD security dashboards, such as GitHub Advanced Security (GHAS) or GitLab Security.

Changes Made

• Added a new sarifFormat to the internal format parsers and presenter options.
• Implemented a new sarif.Presenter utilizing the github.com/owenrumney/go-sarif library to ensure strict compliance with the SARIF v2.1.0 specification.
• Mapped Xeol's internal match.Match objects into standardized SARIF Rules and Results.
• Properly mapped Syft-discovered file coordinates (Locations) so that EOL findings highlight the exact file paths in the user's IDE or PR diffs.

How to Test

1. Build the binary from this branch.
2. Run a scan against a local directory or image with the SARIF output flag:

   xeol dir:. -o sarif > xeol-results.sarif

3. Verify the xeol-results.sarif file is generated properly.

Closes #599