feat: product items

product/proto/admin/product.proto

@@ -19,6 +19,27 @@ service Product {
       body: "*"
     };
   }
+  rpc Items(ItemsReq) returns (ItemsResp) {
+    option (google.api.http) = {
+      get: "/admin/v3/product"
+    };
+  }
+}
+
+message ItemsReq {
+  string name = 1 [(buf.validate.field).string = {max_len: 256}];
+  uint32 page = 2 [(buf.validate.field) = {
+    ignore: IGNORE_IF_ZERO_VALUE,
+    uint32: {gte: 1}
+  }];
+  uint32 page_size = 3 [(buf.validate.field) = {
+    ignore: IGNORE_IF_ZERO_VALUE,
+    uint32: {gte: 1, lte: 100}
+  }];
+}
+
+message ItemsResp {
+  repeated Item items = 1;
 }
 
 message AddReq {