feat(CSENG-58): document snyk:npm:scope and snyk:maven:build_scope SBOM labels.

[snyk-abedonik]

Snyk now enriches every component in generated SBOM documents with Snyk-specific
dependency-scope properties. This PR adds documentation for two new labels:

• snyk:npm:scope — for npm, PNPM, and Yarn projects: prod, dev, unknown
• snyk:maven:build_scope — for Maven projects: compile, provided, runtime, test, system, unknown

The properties are present in all commands that produce SBOM output:
snyk sbom --format=cyclonedx1.6+json, snyk sbom --format=spdx2.3+json,
snyk test --print-deps --json, and snyk monitor --print-deps --json.

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.