Monorepo: consolidate 7 repos into one

Combines shared, blog, market, cart, events, federation, and account
into a single repository. Eliminates submodule sync, sibling model
copying at build time, and per-app CI orchestration.

Changes:
- Remove per-app .git, .gitmodules, .gitea, submodule shared/ dirs
- Remove stale sibling model copies from each app
- Update all 6 Dockerfiles for monorepo build context (root = .)
- Add build directives to docker-compose.yml
- Add single .gitea/workflows/ci.yml with change detection
- Add .dockerignore for monorepo build context
- Create __init__.py for federation and account (cross-app imports)

_config/app-config.yaml

@@ -0,0 +1,83 @@
+root: "/rose-ash-wholefood-coop"  # no trailing slash needed (we normalize it)
+host: "https://rose-ash.com"
+base_host: "wholesale.suma.coop"
+base_login: https://wholesale.suma.coop/customer/account/login/
+base_url: https://wholesale.suma.coop/
+title: ROSE-ASH 2.0
+market_root: /market
+market_title: Market
+blog_root: /
+blog_title: all the news
+cart_root: /cart
+app_urls:
+  blog: "https://blog.rose-ash.com"
+  market: "https://market.rose-ash.com"
+  cart: "https://cart.rose-ash.com"
+  events: "https://events.rose-ash.com"
+  federation: "https://federation.rose-ash.com"
+  account: "https://account.rose-ash.com"
+cache:
+  fs_root: /app/_snapshot  # <- absolute path to your snapshot dir
+categories:
+  allow:
+    Basics: basics
+    Branded Goods: branded-goods
+    Chilled: chilled
+    Frozen: frozen
+    Non-foods: non-foods
+    Supplements: supplements
+    Christmas: christmas
+slugs:
+  skip:
+    - ""
+    - customer
+    - account
+    - checkout
+    - wishlist
+    - sales
+    - contact
+    - privacy-policy
+    - terms-and-conditions
+    - delivery
+    - catalogsearch
+    - quickorder
+    - apply
+    - search
+    - static
+    - media
+section-titles:
+    - ingredients
+    - allergy information
+    - allergens
+    - nutritional information
+    - nutrition
+    - storage
+    - directions
+    - preparation
+    - serving suggestions
+    - origin
+    - country of origin
+    - recycling
+    - general information
+    - additional information
+    - a note about prices
+
+blacklist:
+  category:
+    - branded-goods/alcoholic-drinks
+    - branded-goods/beers
+    - branded-goods/ciders
+    - branded-goods/wines
+  product:
+    - list-price-suma-current-suma-price-list-each-bk012-2-html
+  product-details:
+    - General Information
+    - A Note About Prices
+sumup:
+  merchant_code: "ME4J6100"
+  currency: "GBP"
+  # Name of the environment variable that holds your SumUp API key
+  api_key_env: "SUMUP_API_KEY"
+  webhook_secret: "jfwlekjfwef798ewf769ew8f679ew8f7weflwef"
+
+