Add kith to Packages

[theNamek]

Adds kith to 📦 Packages, placed alphabetically ahead of the existing entries.

• PyPI: https://pypi.org/project/kith-ai/ · Repo: https://github.com/theNamek/kith (MIT)
• Description is 197 chars; markdownlint-cli README.md is clean locally.

LangGraph usage (per the "verify the project uses LangChain/LangGraph" requirement): the library ships kith.integrations.langgraph with two primitives — observe_node() wraps any graph node so its outcome (including exceptions, which re-raise unchanged) becomes a recorded observation, and KithSupervisor selects workers by derived reliability and renders a briefing for the supervisor prompt. It's integration-tested against a real StateGraph on langgraph 1.2.x, not just documented. (Note for others hitting this: LangGraph node names can't contain :, so principal ids like agent:coder need a node-name mapping — that's in the adapter docstring.)

What it does that isn't already in the list: it stores relationship state between agents rather than facts — per-observer observations about other principals, from which trust / reliability / sentiment are derived with decay and provenance. The seeded benchmark in the repo cuts repeat-delegation failures ~82% by consulting that view before routing.

It was recently listed in Awesome-Agent-Memory if a second opinion is useful. Happy to reword, shorten, or move the entry.