chore(oas): replace response with $ref class JSDoc (Store PRO-V) (#3044)

### Scope

Store routes directories PRO to V.

### What

Move inline OAS response schema declaration under their respective class declarations in order to expose them through  `#/components/schemas`. Replace inline OAS response schema with a `$ref` reference pointing to the newly declared schema.

### Why

Having response declared as its own "named" schema will allow OAS code generators to output typed entities/DTO that can be consumed without having to reference the route/operation.

### How

Declare a new @schema JSDoc for each "Res" class used to parse and validate request body. Move the current inline requestBody to the new @schema.

### Test

- Ran OAS validator.
- Ran docs build script.

Expect no visible changes to the documentation.

.changeset/spicy-windows-invent.md

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+---
+"@medusajs/medusa": patch
+---
+
+chore(oas): replace response with $ref class JSDoc (Store PRO-V)