Draft: add radar detector

• Add base Radar Detector to the MetaDetector using pipelinetransformers
• Abstract class for all pretrained detectors with properties as abstarct methods

MR acceptance checklist

Please evaluate this MR against this checklist :

• Linting and typing are OK,
• Licenses are OK (licensecheck + integration with reuse with the proper licenses), -> License is being checked
• You have tested this MR locally,
• You have considered performance issues,
• You have considered availability and reliability risks,
• You have updated documentation if necessary.

Closes #15 (closed)