!2722 【OpenHarmony开源贡献者计划2022】添加registerFont接口以支持ets自定义字体

Merge pull request !2722 from 吴文璐/master

api/@ohos.font.d.ts

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2022 Shenzhen Kaihong Digital Industry Development Co., Ltd.
+ * 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.
+ */
+
+/**
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @since 9
+ * @import font from '@ohos.font';
+ */
+declare namespace font {
+    /**
+   * @since 9
+   */
+  interface FontOptions {
+
+    /**
+     * The font name to register.
+     * @since 9
+     */
+    familyName: string;
+
+    /**
+     * The path of the font file.
+     * @since 9
+     */
+    familySrc: string;
+  }
+  /**
+   * Register a customized font in the FontManager.
+   * @param options FontOptions
+   * @since 9
+   */
+  function registerFont(options: FontOptions):void;
+
+}
+
+export default font;