refactor: migrate to monorepo structure with Docker, PocketBase, and e2e tests

- Reorganize into apps/, packages/, docs/, e2e/, pocketbase/ directories
- Add Dockerfiles for web, worker, and PocketBase services
- Add docker-compose.yml for local orchestration
- Add turbo.json for monorepo task management
- Add Playwright e2e test infrastructure
- Add PocketBase backend with migrations
- Remove Vite/Next.js/ESLint/PostCSS config files
- Update package.json with workspace dependencies
- Add .env.example and .dockerignore

.env.example

@@ -0,0 +1,22 @@
+# Project E Environment Configuration
+# Copy this file to .env and fill in the values
+
+# PocketBase Configuration
+POCKETBASE_URL=http://db:8090
+POCKETBASE_ADMIN_TOKEN=your-secure-random-token-here
+
+# Application Configuration
+NODE_ENV=production
+
+# Public URL (the domain you access Project E through NPM)
+# Example: http://project-e.local or https://project-e.yourdomain.com
+# This is used for generating absolute URLs in emails, webhooks, etc.
+PUBLIC_URL=http://localhost:3000
+
+# Cookie Security
+# Set to 'true' if using HTTPS through NPM, 'false' for HTTP-only LAN access
+COOKIE_SECURE=false
+
+# Allowed Hosts (comma-separated list of domains that can access the app)
+# Example: project-e.local,project-e.yourdomain.com,localhost
+ALLOWED_HOSTS=localhost,project-e.local