docs: merge CLAUDE development guidance into AGENTS_dev

docs: relocate help and PCG workflow docs under docs/

docs: split AGENTS guide and add planning docs

docs: expand slides to 4, add autonomy spectrum context

docs: add slide deck outline for AgentBridge analysis presentation

docs: add architecture and tooling analysis for AgentBridge

docs: add HELP_REFERENCE.md with complete MCP help topic dump

docs: add draw.io diagram and generator script for architecture

docs: add architecture class diagrams with Mermaid for all modules

docs: rewrite root README.md and update CLAUDE.md for consistency

docs: rewrite per-plugin README.md and CLAUDE.md for beginner audience

docs: add per-plugin README.md, update CLAUDE.md for plugin split

Merge pull request #3 from Incurian/feature/plugin-split

refactor: split AgentBridge into 4 separate UE plugins (PLUGIN_SPLIT)

Merge pull request #2 from Incurian/feature/agentbridge-bugs