feat: add api key auth, devii agent, openai gateway, and admin service management

This commit introduces a comprehensive set of new features including API key authentication with CLI management commands (get, reset, backfill), a Devii agentic assistant with WebSocket terminal and session bootstrap, an OpenAI-compatible LLM gateway service, and an admin service management panel. It also adds Playwright browser automation for bot support, configures internal gateway URLs, refactors content editing/deletion to support JSON API responses, and updates documentation across AGENTS.md, README.md, and the developer docs site.

.gitignore

@@ -1,14 +1,24 @@
+.cache
+.local
+.devplace_bots/
 __pycache__/
 *.py[cod]
 *.egg-info/
 .env
 devplace.db*
 devplace-services.lock
+devplace-init.lock
+.vapid.lock
 notification-private.pem
 notification-private.pkcs8.pem
 notification-public.pem
 .pytest_cache/
 .opencode
+devii_*.db
+devii_*.db-shm
+devii_*.db-wal
+devii.log
+webdata/
 devplacepy/static/uploads/attachments/
 devplacepy/static/uploads/*.png
 devplacepy/static/uploads/*.jpg