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/pricing/examples/page.mdx

@@ -27,7 +27,7 @@ In this document, you’ll find common examples of how you can use the Pricing M
 
     // A rule type with \`rule_field=region_id\` should
     // already be present in the database
-    const priceSet = await pricingModuleService.create([
+    const priceSet = await pricingModuleService.createPriceSets([
       {
         rules: [{ rule_field: "region_id" }],
         prices: [
@@ -62,7 +62,7 @@ In this document, you’ll find common examples of how you can use the Pricing M
 
     // A rule type with \`rule_field=region_i\` should 
     // already be present in the database
-    const priceSet = await pricingModuleService.create([
+    const priceSet = await pricingModuleService.createPriceSets([
       {
         rules: [{ rule_field: "region_id" }],
         prices: [
@@ -103,7 +103,7 @@ In this document, you’ll find common examples of how you can use the Pricing M
     const pricingModuleService: IPricingModuleService =
       request.scope.resolve(ModuleRegistrationName.PRICING)
 
-    const priceSets = await pricingModuleService.list()
+    const priceSets = await pricingModuleService.listPriceSets()
 
     res.json({ price_sets: priceSets })
   }
@@ -122,7 +122,7 @@ In this document, you’ll find common examples of how you can use the Pricing M
   export async function GET(request: Request) {
     const pricingModuleService = await initializePricingModule()
 
-    const priceSets = await pricingModuleService.list()
+    const priceSets = await pricingModuleService.listPriceSets()
 
     return NextResponse.json({ price_sets: priceSets })
   }
@@ -150,7 +150,7 @@ In this document, you’ll find common examples of how you can use the Pricing M
     const pricingModuleService: IPricingModuleService =
       request.scope.resolve(ModuleRegistrationName.PRICING)
 
-    const priceSet = await pricingModuleService.retrieve(
+    const priceSet = await pricingModuleService.retrievePriceSet(
       request.params.id
     )
 
@@ -180,7 +180,7 @@ In this document, you’ll find common examples of how you can use the Pricing M
   ) {
     const pricingModuleService = await initializePricingModule()
 
-    const priceSet = await pricingModuleService.retrieve(
+    const priceSet = await pricingModuleService.retrievePriceSet(
       params.id
     )