Centralize runtime/plugin imports and switch modules to use plugins exports; unify EventEmitter usage; update Deno dependencies and small path/server refactors
- Centralized Node and third-party imports in ts/plugins.ts and re-exported commonly used utilities (net, tls, dns, fs, smartfile, smartdns, smartmail, mailauth, uuid, ip, LRUCache, etc).
- Replaced direct EventEmitter / Node built-in imports with plugins.EventEmitter across delivery, smtpclient, routing and the unified email server to standardize runtime integration.
Add local development settings file to grant tooling permissions
- Add a local development settings file to configure permissions used by repository tooling (file-system reads and a small set of shell/CLI operations).
- This is a developer-only configuration — it doesn't change runtime code or published artifacts.
- No functional changes to the mailer library; bumps patch version only to record the repository config change.