Add project: arsenal

[darshjme]

Arsenal is a collection of 100 focused, zero-dependency Python libraries for LLM agent failure modes in production. Each library solves one specific failure class. 4375 tests. MIT license. https://github.com/darshjme/arsenal

Added to projects.yaml under the nlp category as per CONTRIBUTING.md guidelines.

---

Summary by cubic

Add darshjme/arsenal to projects.yaml under the nlp category to include a collection of 100 zero-dependency Python libraries for LLM agent failure modes. This makes the project discoverable in our catalog.

^{Written for commit 3029220. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

---

Since this is your first cubic review, here's how it works:

• cubic automatically reviews your code and comments on bugs and improvements
• Teach cubic by replying to its comments. cubic learns from your replies and gets better over time
• Add one-off context when rerunning by tagging @cubic-dev-ai with guidance or docs links (including llms.txt)
• Ask questions if you need clarification on any suggestion