Add Matrix output type

PiperOrigin-RevId: 519158476

mediapipe/tasks/web/components/containers/BUILD

@@ -34,3 +34,8 @@ mediapipe_ts_declaration(
     name = "rect",
     srcs = ["rect.d.ts"],
 )
+
+mediapipe_ts_declaration(
+    name = "matrix",
+    srcs = ["matrix.d.ts"],
+)

mediapipe/tasks/web/components/containers/matrix.d.ts

@@ -0,0 +1,27 @@
+/**
+ * Copyright 2023 The MediaPipe Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** A two-dimenionsal matrix. */
+export declare interface Matrix {
+  /** The number of rows. */
+  rows: number;
+
+  /** The number of columns. */
+  columns: number;
+
+  /** The values as a flattened one-dimensional array. */
+  data: number[];
+}