chore: add security handbook

[tac0turtle]

Description

This pr adds the well written security/footgun doc to the cosmos sdk docs. Thank you Roman Akhtariev and Alpin Yukseloglu for authoring and allowing us to host it on the cosmos sdk docs

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[coderabbitai]

Walkthrough

The new file, "04-security-part-1.md," provides a detailed guide to security considerations for building appchains on the Cosmos stack, focusing on the core chain. It addresses various security risks and best practices, including non-determinism, in-protocol panics, unmetered/unbounded computation, key malleability, prefix iteration, and fee market/gas issues. The post aims to illuminate the unique security landscape of the Cosmos stack and equip developers with essential guardrails to navigate the security challenges inherent in building appchains.

Changes

File Path	Change Summary
docs/build/.../04-security-part-1.md	Introduced a guide on security for appchains in the Cosmos stack, detailing risks and best practices in chain security.

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[AlpinYukseloglu]

Looks great, thanks for adding this :)

[alexanderbez]

🚀 🚀 🚀 🚀