feat: Update the product options model and refactor the product module (#6685)

The changes in this PR are:
1. Change how product options are created and stored. The relationship changed from
`options --> option values <-- variants`
to
`options --> option values --> variant options <-- variants`

Now we can enforce non-duplicate option values, easier creation and updates of options, and more.

2. Refactors the product module. The product module did a lot of things in a non-ideal approach, and this is a step towards a more consistent usage of the base repository and methods exposed by a module. There is still work left to improve the module, but a large chunk of the changes are included in this PR


Things to do as a follow-up:
1. Remove many-to-many relationships  if an empty list is passed in the base repository.
2. Improve the typings of the module
3. Further cleanup and improvements (there are few questions that I need answered before I can improve the API)

packages/medusa/src/api-v2/admin/products/[id]/options/[option_id]/route.ts

@@ -17,7 +17,6 @@ export const GET = async (
 ) => {
   const remoteQuery = req.scope.resolve("remoteQuery")
 
-  // TODO: Should we allow fetching a option without knowing the product ID? In such case we'll need to change the route to /admin/products/options/:id
   const productId = req.params.id
   const optionId = req.params.option_id
 
@@ -37,7 +36,6 @@ export const POST = async (
   req: AuthenticatedMedusaRequest<UpdateProductOptionDTO>,
   res: MedusaResponse
 ) => {
-  // TODO: Should we allow fetching a option without knowing the product ID? In such case we'll need to change the route to /admin/products/options/:id
   const productId = req.params.id
   const optionId = req.params.option_id
 
@@ -60,7 +58,6 @@ export const DELETE = async (
   req: AuthenticatedMedusaRequest,
   res: MedusaResponse
 ) => {
-  // TODO: Should we allow fetching a option without knowing the product ID? In such case we'll need to change the route to /admin/products/options/:id
   const productId = req.params.id
   const optionId = req.params.option_id
 

packages/medusa/src/api-v2/admin/products/query-config.ts

@@ -22,7 +22,9 @@ export const defaultAdminProductsVariantFields = [
   "ean",
   "upc",
   "barcode",
-  "options",
+  "options.id",
+  "options.option_value.value",
+  "options.option_value.option.title",
 ]
 
 export const retrieveVariantConfig = {
@@ -57,15 +59,12 @@ export const allowedAdminProductRelations = [
   "variants",
   // TODO: Add in next iteration
   // "variants.prices",
-  // TODO: See how this should be handled
-  // "variants.options",
+  "variants.options",
   "images",
   // TODO: What is this?
   // "profiles",
   "options",
-  // TODO: See how this should be handled
-  // "options.values",
-  // TODO: Handle in next iteration
+  "options.values",
   "tags",
   "type",
   "collection",
@@ -121,6 +120,14 @@ export const defaultAdminProductFields = [
   "collection.handle",
   "collection.created_at",
   "collection.updated_at",
+  "options.id",
+  "options.product_id",
+  "options.title",
+  "options.values.id",
+  "options.values.value",
+  "options.created_at",
+  "options.updated_at",
+  "options.deleted_at",
   "tags.id",
   "tags.value",
   "tags.created_at",