feat: script exporting xlsx to json

help message:
export_xls_to_json.py [-h] [-f FILE [FILE ...]] [-d DIRNAME] [-o OUTPUT_DIR]

metadata_tools/commands/export_xls_to_json.py

+import argparse
+import os
+import pathlib
+from metadata_tools.importxls.dish_xls_exporter import DishXlsExporter
+from metadata_tools.importxls.export_utils import save_exported_datasets_to_file
+
+
+parser = argparse.ArgumentParser(description='Load XLS file and export as JSON')
+
+parser.add_argument(
+    '-f',
+    '--file',
+    nargs='+',
+    help='Path to XLS/XLSX file to parse',
+    default=False)
+
+parser.add_argument(
+    '-d',
+    '--directory',
+    help='Directory with XLS/XLSX files',
+    default=False,
+    dest='dirname')
+
+parser.add_argument(
+    '-o',
+    '--output-dir',
+    help='Path to the directory to store JSON files to',
+    default=".",
+    dest="output_dir"
+)
+
+args = parser.parse_args()
+
+fileList = []
+
+if args.dirname:
+    dirname = args.dirname
+    for f in os.listdir(dirname):
+        if os.path.isfile(f):
+            fileList += os.path.join(dirname, f)
+
+if args.file:
+    fileList += args.file
+
+exporter = DishXlsExporter()
+
+for fname in fileList:
+    dataset_dict = exporter.export_submission(fname)
+    fname_json = pathlib.Path(fname).stem + ".json"
+    fname_out = os.path.join(args.output_dir, fname_json)
+    with open(fname_out, 'w') as outfile:
+        save_exported_datasets_to_file(dataset_dict, outfile)