cli: write several report formats from one analyze run #188

polyscan analyze --format writes exactly one report in html, json or text.

pyscn analyze takes --html, --json, --csv, --yaml and --text, and writes every selected report from a single analysis run. -o - writes the report to stdout.

The JavaScript/TypeScript code in polyscan already contains CSV and YAML formatters, but the CLI does not offer them.

Proposal:

• Allow several report formats from one run.
• Offer CSV and YAML for the combined multi-language report, or delete the unused formatters.