feat: extract shared infrastructure from shared_lib

Phase 1-3 of decoupling plan:
- Shared DB, models, infrastructure, browser, config, utils
- Event infrastructure (domain_events outbox, bus, processor)
- Structured logging
- Generic container concept (container_type/container_id)
- Alembic migrations for all schema changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

editor/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "coop-lexical-editor",
+  "version": "2.0.0",
+  "private": true,
+  "scripts": {
+    "build": "node build.mjs",
+    "build:prod": "NODE_ENV=production node build.mjs",
+    "dev": "node build.mjs --watch"
+  },
+  "dependencies": {
+    "@tryghost/koenig-lexical": "^1.7.10",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1"
+  },
+  "devDependencies": {
+    "esbuild": "^0.24.0"
+  }
+}