Long memory for agents

[lukemartinlogan]

@AGENTS.md

Clone the following repository under context-transfer-engine/benchmark.
(HTTP) https://github.com/iowarp/memorybench.git
(SSH) git@github.com:iowarp/memorybench.git

I want to add a new benchmark for iowarp here.

Other example codes:
https://github.com/vectorize-io/hindsight?tab=readme-ov-file
https://github.com/getzep/graphiti