Companion to 8df5d5c (which only carried the doc updates — the example
directories themselves were left out of staging by mistake). This
commit adds the actual example mappes:
- examples/lethal-trifecta-walkthrough/{README.md, run-trifecta.mjs,
expected-findings.md}
- examples/mcp-rug-pull/{README.md, run-rug-pull.mjs,
expected-findings.md}
Plus plugin CLAUDE.md "Examples (runnable demonstrations)" section
with a 4-row table covering malicious-skill-demo, prompt-injection-
showcase, lethal-trifecta-walkthrough, and mcp-rug-pull plus the
state-isolation discipline notes.
Marketplace root README unchanged since plugin's outward coverage
is unchanged ([skip-docs] covers the marketplace-level gate).
