Add AGENTS.md guide for AI coding assistants

[lsm5]

Similar to https://github.com/containers/podman/blob/main/AGENTS.md, this provides context and guidance for AI agents working with container-selinux development, including SELinux policy structure, testing patterns, and common pitfalls.

Summary by Sourcery

Documentation:

• Introduce AGENTS.md with guidance for AI coding assistants on SELinux policy structure, testing workflows, platform nuances, and common pitfalls when working on container-selinux.

[sourcery-ai]

Reviewer's Guide

Adds a new AGENTS.md guide targeted at AI coding assistants, documenting project context, development workflows, policy structure, testing, and pitfalls for working on container-selinux.

File-Level Changes

Change	Details	Files
Introduce AGENTS.md as a comprehensive guide for AI coding assistants contributing to container-selinux.	Describe project purpose and quick-start build/test commands for container-selinux. Document codebase layout, SELinux policy module components (.te, .if, .fc) and Udica CIL templates. Outline testing strategy using BATS and Podman SELinux tests, including manual verification commands. Capture code standards, platform-specific (RHEL/Fedora) considerations, key SELinux booleans, and essential tooling. List common pitfalls for AI agents and reference related documentation such as CLAUDE.md, README, spec file, Packit config, and external SELinux/Udica resources.	AGENTS.md

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[gemini-code-assist]

Summary of Changes

Hello @lsm5, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new AGENTS.md guide, specifically tailored for AI coding assistants. Its purpose is to equip AI agents with the necessary context and guidelines for effective contribution to container-selinux development, covering critical aspects like SELinux policy structure, testing methodologies, and common development challenges, thereby streamlining their integration into the project's workflow.

Highlights

• New AI Agent Guide: A new AGENTS.md file has been added, providing a dedicated guide for AI coding assistants working on container-selinux development.
• Comprehensive Development Context: The guide offers extensive context on SELinux policy structure, development patterns, testing frameworks, and common pitfalls specific to container-selinux.
• Essential Resources: It includes quick start commands, codebase structure overview, key SELinux tunables, important tools and libraries, and essential commands for policy analysis, development, debugging, and testing.

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[gemini-code-assist]

Code Review

This pull request introduces an AGENTS.md file, which serves as a comprehensive guide for AI coding assistants working with the container-selinux repository. The document is well-structured and covers important aspects like project overview, codebase structure, development patterns, testing, and common pitfalls. This is a valuable addition for automating and assisting with development tasks. I have one minor suggestion regarding a broken link in the documentation section.

[gemini-code-assist]

This line references CLAUDE.md, but this file does not appear to exist in the repository, which will result in a broken link. Please consider either adding the CLAUDE.md file in this or a subsequent pull request, or removing this reference if it's not intended to be included.

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.

[packit-as-a-service]

Tests failed. @containers/packit-build please check.