Add docker-compose.yml: a disposable Stalwart instance with a fixed dev
admin account (STALWART_RECOVERY_ADMIN), matching the credentials
scripts/dev-token.ps1 already expected. Wired up via new npm scripts
(dev:server, dev:server:down, dev:server:logs).
scripts/dev-token.ps1 was previously untracked (the whole scripts/
directory was gitignored) even though it's part of the documented dev
workflow — un-ignored it, and added scripts/dev-token.sh, a POSIX
equivalent for non-Windows shells and AI agents without PowerShell.
New DEVELOPMENT.md documents the full loop end-to-end (start server,
get a token, run the dev server, verify), written so it's actionable by
both humans and AI coding agents without needing a browser. Linked from
AGENTS.md (Commands) and README.md (Getting started).
Verified manually: docker compose up brings the server to a healthy
state, /api/auth + /auth/token issue a working bearer token, and
/jmap/session returns 200 with it end-to-end.
