Add agentflow to Project/Tooling Updates

[thaicn1712]

Adding a link to agentflow under Project/Tooling Updates.

agentflow bundles four independent crates (graphflow-stream, guardflow, schemaflow, evalflow - each already submitted separately) under one AgentOps-themed umbrella for people who want all four without four separate cargo add commands, plus AgentOpsTask gluing guard + evaluate together for a single graph_flow::Task.

https://crates.io/crates/agentflow

[github-actions]

Thank you for your contribution to This Week in Rust! Our automated checks found some possible issues with these changes:

Link check

• warning: link https://github.com/thaicn1712/agentflow is directly to a GitHub repo; please double check our guidelines here: https://github.com/rust-lang/this-week-in-rust#projectstooling-updates

You can see more details here: https://github.com/rust-lang/this-week-in-rust/actions/runs/31170886887

[nellshamrell]

Hello there!

We currently only allow one link submission to the Projects/Tooling section per contributor per week. Please pick one of the links you have submitted this week and open a new pull request with only that link. Closing the rest of the pull requests in the meantime.

Also please know that we are making changes to the link submission/review process for the Projects/Tooling section starting next issue. Please see this GitHub issue for more information.