chore(legacy): relocate v1 dataconnect source

legacy/dataconnect-v1/connector/customRateCard/mutations.gql

@@ -0,0 +1,37 @@
+mutation createCustomRateCard(
+  $name: String!,
+  $baseBook: String,
+  $discount: Float,
+  $isDefault: Boolean
+) @auth(level: USER) {
+  customRateCard_insert(
+    data: {
+      name: $name,
+      baseBook: $baseBook,
+      discount: $discount,
+      isDefault: $isDefault
+    }
+  ) 
+}
+
+mutation updateCustomRateCard(
+  $id: UUID!,
+  $name: String,
+  $baseBook: String,
+  $discount: Float,
+  $isDefault: Boolean
+) @auth(level: USER) {
+  customRateCard_update(
+    id: $id,
+    data: {
+      name: $name,
+      baseBook: $baseBook,
+      discount: $discount,
+      isDefault: $isDefault
+    }
+  ) 
+}
+
+mutation deleteCustomRateCard($id: UUID!) @auth(level: USER) {
+  customRateCard_delete(id: $id) 
+}