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/commerce-modules/auth/page.mdx

@@ -99,7 +99,8 @@ For example:
       req.scope.resolve(ModuleRegistrationName.AUTH)
 
     res.json({
-      authIdentitys: authModuleService.list(),
+      authIdentitys: 
+        await authModuleService.listAuthIdentities(),
     })
   }
   ```
@@ -120,7 +121,8 @@ For example:
     const authModuleService: IAuthModuleService =
       container.resolve(ModuleRegistrationName.AUTH)
 
-    const authIdentitys = await authModuleService.list()
+    const authIdentitys = await authModuleService
+      .listAuthIdentities()
   }
   ```
 
@@ -141,7 +143,8 @@ For example:
       container.resolve(
         ModuleRegistrationName.AUTH
       )
-    const authIdentitys = await authModuleService.list()
+    const authIdentitys = await authModuleService
+      .listAuthIdentities()
   })
   ```