Add project scaffolding and documentation

Add .env.example with configuration for database, Redis, security, SMTP, workers, and plugins. Add .gitignore for Python, Node.js, Next.js, Docker volumes, and IDE files. Add MIT License. Update README.md with feature overview, quick start guide, architecture description, plugin system documentation, security details, backup/restore instructions, and developer setup. Add Alembic configuration files and placeholder directories for API, web, worker, and plugin components

docker/worker.Dockerfile

@@ -0,0 +1,27 @@
+FROM python:3.12-slim-bookworm AS base
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1 \
+    POETRY_NO_INTERACTION=1 \
+    POETRY_VIRTUALENVS_CREATE=false
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    libpq-dev \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip install --no-cache-dir poetry
+
+COPY pyproject.toml poetry.lock* /app/
+COPY apps/api /app/apps/api
+COPY apps/worker /app/apps/worker
+COPY packages/shared /app/packages/shared
+COPY plugins /app/plugins
+
+RUN poetry install --no-root
+
+CMD ["celery", "-A", "apps.worker.src.celery_app", "worker", "-l", "info", "-c", "4"]