Add 8bitconcepts research papers (Guides) + newsletter

[unitedideas]

Adding two 8bitconcepts research papers to Guides & Playbooks — both address practical AI engineering concerns that fit the current section's framing (patterns, pitfalls, tradeoffs):

• The Hallucination Budget — how to quantify hallucination cost and pick mitigation strategies that match actual risk tolerance. Useful for anyone shipping RAG/LLM systems where the wrong hallucination rate is a product problem, not just a model problem.
• The Guardrails Gap — why traditional enterprise AI safety frameworks break down once agents start acting autonomously. Complements the "Building Effective Agents" entry directly above.

Plus adding the 8bitconcepts RSS feed to Newsletters — weekly independent research on enterprise AI adoption.

All three resources are free and readable without signup. Happy to trim if any feel off-fit.