feat(core-flows): calculate SO price on cart ops (#10563)

**What**
- calculate the shipping option price when creating a shipping method
- calculate the shipping option price when refreshing cart
- add testing for calculated SO flow
- fix validation on calculated SO creation
- add manual fulfillment provider for testing
- add `from_location` to calculation context

---

RESOLVES CMRC-778
RESOLVES CMRC-602
RESOLVES SUP-136

integration-tests/http/src/utils/providers/fulfillment-manual-calculated/index.ts

@@ -0,0 +1,8 @@
+import { ModuleProvider, Modules } from "@medusajs/framework/utils"
+import { ManualFulfillmentService } from "./services/manual-fulfillment"
+
+const services = [ManualFulfillmentService]
+
+export default ModuleProvider(Modules.FULFILLMENT, {
+  services,
+})

integration-tests/http/src/utils/providers/fulfillment-manual-calculated/services/manual-fulfillment.ts

@@ -0,0 +1,54 @@
+import { AbstractFulfillmentProviderService } from "@medusajs/framework/utils"
+
+export class ManualFulfillmentService extends AbstractFulfillmentProviderService {
+  static identifier = "manual-calculated"
+
+  constructor() {
+    super()
+  }
+
+  async getFulfillmentOptions() {
+    return [
+      {
+        id: "manual-fulfillment-calculated",
+      },
+      {
+        id: "manual-fulfillment-return-calculated",
+        is_return: true,
+      },
+    ]
+  }
+
+  async validateFulfillmentData(optionData, data, context) {
+    return data
+  }
+
+  async calculatePrice(optionData, data, context) {
+    return {
+      calculated_amount:
+        context.items.reduce((acc, i) => acc + i.quantity, 0) * 1.5, // mock caluclation as 1.5 per item
+      is_calculated_price_tax_inclusive: false,
+    }
+  }
+
+  async canCalculate() {
+    return true
+  }
+
+  async validateOption(data) {
+    return true
+  }
+
+  async createFulfillment() {
+    // No data is being sent anywhere
+    return {}
+  }
+
+  async cancelFulfillment() {
+    return {}
+  }
+
+  async createReturnFulfillment() {
+    return {}
+  }
+}