docs: fix code block titles (#5733)

* docs: fix code block titles

* remove console

* fix build error

www/apps/docs/content/modules/carts-and-checkout/backend/add-fulfillment-provider.md

@@ -32,7 +32,7 @@ Fulfillment providers are loaded and installed on the backend startup.
 
 The first step is to create a JavaScript or TypeScript file under `src/services`. For example, create the file `src/services/my-fulfillment.ts` with the following content:
 
-```ts title=src/services/my-fulfillment.ts
+```ts title="src/services/my-fulfillment.ts"
 import { 
   AbstractFulfillmentService, 
   Cart, 

www/apps/docs/content/modules/carts-and-checkout/backend/add-payment-provider.md

@@ -60,7 +60,7 @@ The first step to create a payment processor is to create a JavaScript or TypeSc
 
 For example, create the file `src/services/my-payment-processor.ts` with the following content:
 
-```ts title=src/services/my-payment-processor.ts
+```ts title="src/services/my-payment-processor.ts"
 import { 
   AbstractPaymentProcessor, 
   PaymentProcessorContext, 

www/apps/docs/content/modules/carts-and-checkout/backend/cart-completion-strategy.md

@@ -19,7 +19,7 @@ This guide only explains how to override the cart completion strategy. It’s hi
 
 Create a TypeScript or JavaScript file in `src/strategies` of your Medusa backend project with a class that extends the `AbstractCartCompletionStrategy` class:
 
-```ts title=src/strategies/cart-completion.ts
+```ts title="src/strategies/cart-completion.ts"
 import { 
   AbstractCartCompletionStrategy,
   CartCompletionResponse,
@@ -52,7 +52,7 @@ You can use a constructor to access services and resources registered in the dep
 
 <!-- eslint-disable prefer-rest-params -->
 
-```ts title=src/strategies/cart-completion.ts
+```ts title="src/strategies/cart-completion.ts"
 // ...
 import { IdempotencyKeyService } from "@medusajs/medusa"