docs: fix an install command that does not work — protocol-bench is not on PyPI

Link the rest of the portfolio, and the docs site

Remove a stray __pycache__ artifact

Link protocol-bench-action into the portfolio

Polish card: portfolio cross-links, live demo, richer tags

Protocol-Bench: 15 published IEEE 802.11 / 3GPP procedures with ground-truth safety verdicts and replay-validated counterexamples

initial commit