feat(dashboard): Discounts details + edits (#6547)

**What**
- Discounts details page
- Edit discount details
- Edit discount configurations
- `ListSummary` component

**NOTE**
- conditions edit form will be implemented in a separate PR
- edit details from is missing metadata component which will be added later

---


https://github.com/medusajs/medusa/assets/16856471/c878af4a-48c2-4c45-b824-662784c7a139

packages/admin-next/dashboard/src/lib/common.ts

@@ -0,0 +1,16 @@
+/**
+ * Pick properties from an object and copy them to a new object
+ * @param obj
+ * @param keys
+ */
+export function pick(obj: Record<string, any>, keys: string[]) {
+  const ret: Record<string, any> = {}
+
+  keys.forEach((k) => {
+    if (k in obj) {
+      ret[k] = obj[k]
+    }
+  })
+
+  return ret
+}