fasterdata-tuning v1.3.0: fq default pacing; optional tbf cap; docs + changelog

[ShawnMcKee]

This PR updates fasterdata-tuning.sh to v1.3.0 and refreshes related documentation.

Highlights

• Default to fq for TCP packet pacing on DTN targets.
• Optional tbf interface cap via --use-tbf-cap / --tbf-cap-rate (alias --packet-pacing-rate deprecated).
• Audit accepts fq and tbf as pacing applied; colorized output: fq (green), tbf (cyan). Persistence mirrors chosen mode.
• Docs: new fq vs tbf explainer, updated tuning script docs and anchors, nav update, and CHANGELOG entry.

Build

• MkDocs site builds cleanly; previous missing-anchor warnings resolved.

Verification

• Audit: ./docs/perfsonar/tools_scripts/fasterdata-tuning.sh --mode audit shows fq/tbf status per NIC.
• Apply (fq default): sudo ./docs/perfsonar/tools_scripts/fasterdata-tuning.sh --mode apply --apply-packet-pacing.
• Apply (tbf cap): sudo ./docs/perfsonar/tools_scripts/fasterdata-tuning.sh --mode apply --apply-packet-pacing --use-tbf-cap --tbf-cap-rate 2000mbps.

Compatibility

• --packet-pacing-rate remains as a deprecated alias for --tbf-cap-rate; no other breaking changes.

Please review pacing defaults, CLI flag naming, and docs wording.