Rename leftovers in code after benchmark-tool → tools-benchmark #35

The repo was renamed (ADR 0005 in .product). The living docs were updated in #34. The old name is still in code and fixtures, which were left alone because work is ongoing there:

• package.json, quality/package.json, quality/Dockerfile, quality/run.mjs
• tests/fixtures/results_v1.json: probably keep it, since it is a historical fixture.
• Clone instructions and paths such as cd benchmark-tool in scripts and CI.