feat(index): Provide a similar API to Query (#9193)

**What**
Align the index engine API to be similar to the Query API

## Example

```ts
        // Benefit from the same level of typing like the remote query

        const { data, metadata } = await indexEngine.query<'product'>({
          fields: [
            "product.*",
            "product.variants.*",
            "product.variants.prices.*",
          ],
          filters: {
            product: {
              variants: {
                prices: {
                  amount: { $gt: 50 },
                },
              },
            },
          },
          pagination: {
            order: {
              product: {
                variants: {
                  prices: {
                    amount: "DESC",
                  },
                },
              },
            },
          },
        })
```

packages/modules/index/src/utils/normalize-fields-selection.ts

@@ -0,0 +1,7 @@
+import { objectFromStringPath } from "@medusajs/utils"
+
+export function normalizeFieldsSelection(fields: string[]) {
+  const normalizedFields = fields.map((field) => field.replace(/\.\*/g, ""))
+  const fieldsObject = objectFromStringPath(normalizedFields)
+  return fieldsObject
+}