chore(docs): Refactor API Reference (#1883)

docs/api/admin/paths/orders_{id}_shipping-methods.yaml

@@ -0,0 +1,49 @@
+post:
+  operationId: PostOrdersOrderShippingMethods
+  summary: Add a Shipping Method
+  description: >-
+    Adds a Shipping Method to an Order. If another Shipping Method exists with
+    the same Shipping Profile, the previous Shipping Method will be replaced.
+  x-authenticated: true
+  parameters:
+    - in: path
+      name: id
+      required: true
+      description: The ID of the Order.
+      schema:
+        type: string
+  tags:
+    - Order
+  responses:
+    '200':
+      description: OK
+      content:
+        application/json:
+          schema:
+            properties:
+              order:
+                $ref: ../components/schemas/order.yaml
+  requestBody:
+    content:
+      application/json:
+        schema:
+          type: object
+          required:
+            - price
+            - option_id
+          properties:
+            price:
+              type: integer
+              description: >-
+                The price (excluding VAT) that should be charged for the
+                Shipping Method
+            option_id:
+              type: string
+              description: >-
+                The ID of the Shipping Option to create the Shipping Method
+                from.
+            data:
+              type: object
+              description: >-
+                The data required for the Shipping Option to create a Shipping
+                Method. This will depend on the Fulfillment Provider.