* docs: add AGENTS.MD for AI and developer guidance
* docs: update project name from Etherpad Lite to Etherpad
* docs: fix incorrect test directory path in AGENTS.MD
* docs: correct test stack description in AGENTS.MD (Mocha is primary)
* docs: fix incorrect easysync documentation path in AGENTS.MD
* chore: add .pr_agent.toml to enable automatic PR review/description on push
* docs: remove nodejs version from README and AGENTS.MD (prefer package.json)
* docs: standardize all indentation to 2 spaces
* chore: update src/package.json node engine to match root (>=20.0.0)
basically copy/pasting contributing.md but gives qodo a reference point, I'd of used a sym link but I don't know how well that would have worked so for now lets just add some cruft and see what happens..
