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>

requirements.txt

@@ -0,0 +1,5 @@
+flask==3.1.0
+gunicorn==23.0.0
+requests==2.32.3
+beautifulsoup4==4.13.3
+lxml==5.3.1