docs: add AI-native onboarding group (docs for AI/agents, MCP setup, prompt library)#21842

claude[bot] wants to merge 2 commits into

developethereum-optimism/optimism:developfrom

docs-improver/c4-ai-onboardingethereum-optimism/optimism:docs-improver/c4-ai-onboardingCopy head branch name to clipboard