docs: updates to use DML and other changes (#7834)

- Change existing data model guides and add new ones for DML
- Change module's docs around service factory + remove guides that are now necessary
- Hide/remove all mentions of module relationships, or label them as coming soon.
- Change all data model creation snippets to use DML
- use `property` instead of `field` when referring to a data model's properties.
- Fix all snippets in commerce module guides to use new method suffix (no more main model methods)
- Rework recipes, removing/hiding a lot of sections as a lot of recipes are incomplete with the current state of DML.


### Other changes

- Highlight fixes in some guides
- Remove feature flags guide
- Fix code block styles when there are no line numbers.

### Upcoming changes in other PRs

- Re-generate commerce module references (for the updates in the method names)
- Ensure that the data model references are generated correctly for models using DML.
- (probably at a very later point) revisit recipes

www/apps/resources/app/recipes/multi-region-store/page.mdx

@@ -114,15 +114,11 @@ Using the tax-inclusive feature, merchants can specify prices including taxes pe
     }
   },
   {
-    href: "#",
+    href: "/storefront-development/products/price",
     title: "Display Product Price in Storefront",
     text: "Learn how to display the correct product price in a storefront.",
     startIcon: <AcademicCapSolid />,
     showLinkIcon: false,
-    badge: {
-      variant: "blue",
-      children: "Guide Soon"
-    }
   },
 ]} />