feat: initialize market app with browsing, product, and scraping code

Split from coop monolith. Includes:
- Market/browse/product blueprints
- Product sync API
- Suma scraping pipeline
- Templates for market, browse, and product views
- Dockerfile and CI workflow for independent deployment

scrape/persist_api/__init__.py

@@ -0,0 +1,6 @@
+from .upsert_product import upsert_product
+from .log_product_result import log_product_result
+from .save_nav import save_nav
+from .save_subcategory_redirects import save_subcategory_redirects
+from .capture_listing import capture_listing
+