refactor: add .copier-answers.yml at root + feature flags + .env.example

.copier-answers.yml (new, at repo root):
- Points to local template path (was GitLab remote)
- _commit: v0.19.0 (enables copier update)
- Reflects actual feature set: enable_cms, enable_daas, not directory/i18n/leads

web/src/beanflows/core.py:
- Added ENABLE_CMS/ENABLE_DAAS/ENABLE_DIRECTORY/ENABLE_LEADS/BUSINESS_MODEL
  to Config class (mirrors copier.yml questions for runtime feature gating)

.env.example (new, at repo root):
- Moved from web/.env.example; updated DUCKDB_PATH/SERVING_DUCKDB_PATH
  to root-relative paths (local.duckdb, analytics.duckdb)

.gitignore:
- Added web/src/beanflows/static/css/output.css (previously only in web/.gitignore)

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

.env.example

@@ -0,0 +1,38 @@
+# App
+APP_NAME=BeanFlows
+SECRET_KEY=change-me-generate-a-real-secret
+BASE_URL=http://localhost:5001
+DEBUG=true
+ADMIN_EMAILS=admin@beanflows.coffee
+
+# Database
+DATABASE_PATH=data/app.db
+# DUCKDB_PATH points to the full pipeline DB (lakehouse.duckdb) — used by SQLMesh and export_serving.
+# SERVING_DUCKDB_PATH points to the serving-only export (analytics.duckdb) — used by the web app.
+# Run `uv run materia pipeline run export_serving` after each SQLMesh transform to populate it.
+DUCKDB_PATH=local.duckdb
+SERVING_DUCKDB_PATH=analytics.duckdb
+
+# Auth
+MAGIC_LINK_EXPIRY_MINUTES=15
+SESSION_LIFETIME_DAYS=30
+
+# Email (Resend)
+RESEND_API_KEY=
+EMAIL_FROM=hello@example.com
+
+
+# Paddle
+PADDLE_API_KEY=
+PADDLE_WEBHOOK_SECRET=
+PADDLE_PRICE_STARTER=
+PADDLE_PRICE_PRO=
+
+
+# Rate limiting
+RATE_LIMIT_REQUESTS=100
+RATE_LIMIT_WINDOW=60
+
+# Waitlist (set to true to enable waitlist gate on /auth/signup)
+WAITLIST_MODE=false
+RESEND_AUDIENCE_WAITLIST=