feat(dashboard): Draft orders create (#6680)

**What**
- Adds Create draft order form
- Updates draft order details page to also display "custom" items.

**Note**
- Currently, the form is missing a way to input a discount code. Need to rethink this a bit, as the we can't implement the design in Figma.
- The current design is missing a way to select from a customers existing shipping addresses, we should add that to keep the features we have today.
- This PR uses `useInfiniteQuery` which does not work on our staging (due to duplicate dependencies as a result of building straight from the monorepo), so you will need to test locally.

packages/admin-next/dashboard/public/locales/en-US/translation.json

@@ -62,7 +62,8 @@
     "edit": "Edit",
     "download": "Download",
     "clearAll": "Clear all",
-    "apply": "Apply"
+    "apply": "Apply",
+    "add": "Add"
   },
   "filters": {
     "date": {
@@ -391,6 +392,34 @@
     "status": {
       "open": "Open",
       "completed": "Completed"
+    },
+    "create": {
+      "createDraftOrder": "Create Draft Order",
+      "createDraftOrderHint": "Create a new draft order to manage the details of an order before it is placed.",
+      "chooseRegionHint": "Choose region",
+      "existingItemsLabel": "Existing items",
+      "existingItemsHint": "Add existing products to the draft order.",
+      "customItemsLabel": "Custom items",
+      "customItemsHint": "Add custom items to the draft order.",
+      "addExistingItemsAction": "Add existing items",
+      "addCustomItemAction": "Add custom item",
+      "noCustomItemsAddedLabel": "No custom items added yet",
+      "noExistingItemsAddedLabel": "No existing items added yet",
+      "chooseRegionTooltip": "Choose a region first",
+      "useExistingCustomerLabel": "Use existing customer",
+      "addShippingMethodsAction": "Add shipping methods",
+      "unitPriceOverrideLabel": "Unit price override",
+      "shippingOptionLabel": "Shipping option",
+      "shippingOptionHint": "Choose the shipping option for the draft order.",
+      "shippingPriceOverrideLabel": "Shipping price override",
+      "shippingPriceOverrideHint": "Override the shipping price for the draft order.",
+      "sendNotificationLabel": "Send notification",
+      "sendNotificationHint": "Send a notification to the customer when the draft order is created."
+    },
+    "validation": {
+      "requiredEmailOrCustomer": "Email or customer is required.",
+      "requiredItems": "At least one item is required.",
+      "invalidEmail": "Email must be a valid email address."
     }
   },
   "discounts": {
@@ -846,6 +875,7 @@
     "orders": "Orders",
     "account": "Account",
     "total": "Total",
+    "totalExclTax": "Total excl. tax",
     "subtotal": "Subtotal",
     "shipping": "Shipping",
     "tax": "Tax",
@@ -887,6 +917,7 @@
     "thumbnail": "Thumbnail",
     "sku": "SKU",
     "managedInventory": "Managed inventory",
+    "allowBackorder": "Allow backorder",
     "inStock": "In stock",
     "location": "Location",
     "quantity": "Quantity",
@@ -896,9 +927,11 @@
     "maxSubtotal": "Max. Subtotal",
     "shippingProfile": "Shipping Profile",
     "summary": "Summary",
+    "details": "Details",
     "label": "Label",
     "rate": "Rate",
     "requiresShipping": "Requires shipping",
+    "unitPrice": "Unit price",
     "startDate": "Start date",
     "endDate": "End date",
     "draft": "Draft"