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>

.dockerignore

@@ -0,0 +1,7 @@
+.git
+.gitignore
+mindmegette-examples
+*.md
+__pycache__
+*.pyc
+.env