Add AI-Ready workflow documentation and guidelines for creating or updating AGENTS.md files

[amir-yogev-gh]

This pull request introduces a new ai-ready workflow for making projects AI-friendly by ensuring accurate AGENTS.md files and auditing AI convention files. It provides clear documentation, guidelines, and a step-by-step skill for scanning, updating, and validating project instructions for AI coding agents. The workflow emphasizes accuracy, project-specificity, and safety, and is designed to be idempotent and minimally invasive.

Key changes include:

Documentation and Workflow Overview

• Added ai-ready/README.md to explain the purpose, usage, and directory structure of the AI-Ready workflow, including how it manages AGENTS.md and audits AI convention files.
• Added ai-ready/SKILL.md as a workflow overview, outlining the process, quick start instructions, and example session for onboarding or updating a project for AI agents.

Guidelines and Principles

• Introduced ai-ready/guidelines.md detailing core principles (accuracy, project-specificity, idempotency), safety rules, quality standards, and project integration guidance for the workflow.

Command and Skill Implementation

• Added ai-ready/commands/update.md to define the /update command, which loads the guidelines and executes the update skill, optionally taking arguments for targeted updates.
• Added ai-ready/skills/update.md providing a detailed, step-by-step process for discovering current state, analyzing the codebase, creating/updating AGENTS.md, auditing AI convention files, validating changes, and reporting results.