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## Description
- Split metrics dashboard into two modules: calculator (statistics) and
generator (visualization)
- Added aggregate metrics as a new phase in evaluation pipeline
- Created modal example to run multiple evaluations in parallel and
collect results into a single combined output
## DCO Affirmation
I affirm that all code in every commit of this pull request conforms to
the terms of the Topoteretes Developer Certificate of Origin
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## Summary by CodeRabbit
- **New Features**
- Enhanced metrics reporting with improved visualizations, including
histogram and confidence interval plots.
- Introduced an asynchronous evaluation process that supports parallel
execution and streamlined result aggregation.
- Added new configuration options to control metrics calculation and
aggregated output storage.
- **Refactor**
- Restructured dashboard generation and evaluation workflows into a more
modular, maintainable design.
- Improved error handling and logging for better feedback during
evaluation processes.
- **Bug Fixes**
- Updated test cases to ensure accurate validation of the new dashboard
generation and metrics calculation functionalities.
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