feat: initial recipe-importer application

Python/Flask web app that scrapes Hungarian recipe sites (mindmegette.hu)
and imports them into Mealie via its REST API. Includes dark-themed web UI
with editable preview, Dockerfile, build script, and docker-compose.

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

Dockerfile

@@ -0,0 +1,19 @@
+FROM python:3.12-slim
+
+ARG VERSION=dev
+ENV VERSION=${VERSION}
+ENV PYTHONUNBUFFERED=1
+ENV DATA_DIR=/data
+
+WORKDIR /app
+
+# Install dependencies first (layer caching)
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application
+COPY app/ app/
+
+EXPOSE 8000
+
+CMD ["gunicorn", "-b", "0.0.0.0:8000", "-w", "2", "--access-logfile", "-", "app.main:app"]