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/api-key/examples/page.mdx

@@ -25,7 +25,7 @@ In this guide, you’ll find common examples of how you can use the API Key Modu
     const apiKeyModuleService: IApiKeyModuleService =
       request.scope.resolve(ModuleRegistrationName.API_KEY)
 
-    const apiKey = await apiKeyModuleService.create({
+    const apiKey = await apiKeyModuleService.createApiKeys({
       title: "Publishable API key",
       type: "publishable",
       created_by: "user_123",
@@ -50,7 +50,7 @@ In this guide, you’ll find common examples of how you can use the API Key Modu
   export async function POST(request: Request) {
     const apiKeyModuleService = await initializeApiKeyModule()
 
-    const apiKey = await apiKeyModuleService.create({
+    const apiKey = await apiKeyModuleService.createApiKeys({
       title: "Publishable API key",
       type: "publishable",
       created_by: "user_123",
@@ -85,7 +85,7 @@ In this guide, you’ll find common examples of how you can use the API Key Modu
       request.scope.resolve(ModuleRegistrationName.API_KEY)
 
     res.json({
-      api_keys: await apiKeyModuleService.list(),
+      api_keys: await apiKeyModuleService.listApiKeys(),
     })
   }
   ```
@@ -104,7 +104,7 @@ In this guide, you’ll find common examples of how you can use the API Key Modu
     const apiKeyModuleService = await initializeApiKeyModule()
 
     return NextResponse.json({
-      api_keys: await apiKeyModuleService.list(),
+      api_keys: await apiKeyModuleService.listApiKeys(),
     })
   }
   ```
@@ -279,7 +279,7 @@ In this guide, you’ll find common examples of how you can use the API Key Modu
       }
     )
 
-    const newKey = await apiKeyModuleService.create({
+    const newKey = await apiKeyModuleService.createApiKeys({
       title: revokedKey.title,
       type: revokedKey.type,
       created_by: revokedKey.created_by,
@@ -318,7 +318,7 @@ In this guide, you’ll find common examples of how you can use the API Key Modu
       revoked_by: params.user_id,
     })
 
-    const newKey = await apiKeyModuleService.create({
+    const newKey = await apiKeyModuleService.createApiKeys({
       title: revokedKey.title,
       type: revokedKey.type,
       created_by: revokedKey.created_by,