Preserve long paths in usage output

[Chien Yuan Chang (chienyuanchang)]

Summary

• prevent Rich from inserting hard line breaks inside long input paths in usage output
• verify the usage heading is rendered with soft wrapping

Validation

• pytest packages/standalone/tests/unit/test_cli.py -k analyze_usage -q
• pytest packages/standalone/tests/unit/test_cli.py -q
• ruff check packages/standalone/src/cu_cli/commands/analyze.py packages/standalone/tests/unit/test_cli.py
• bash scripts/ci.sh (with the repository virtual environment on PATH)
• git diff --check