[New Feature] Support SAM 2.1 (#59)

* support sam 2.1

* refine config path and ckpt path

* update README

demo/frontend/schemas/merge-schemas.ts

@@ -0,0 +1,33 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * 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.
+ */
+import {loadFilesSync} from '@graphql-tools/load-files';
+import {mergeTypeDefs} from '@graphql-tools/merge';
+import fs from 'fs';
+import {print} from 'graphql';
+import path from 'path';
+import * as prettier from 'prettier';
+import {fileURLToPath} from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const loadedFiles = loadFilesSync(`${__dirname}/*.graphql`);
+const typeDefs = mergeTypeDefs(loadedFiles);
+const printedTypeDefs = print(typeDefs);
+const prettyTypeDefs = await prettier.format(printedTypeDefs, {
+  parser: 'graphql',
+});
+fs.writeFileSync('schema.graphql', prettyTypeDefs);