chore: add license for the repo

LICENSE

@@ -0,0 +1,32 @@
+This repository contains files licensed under multiple licenses. The licensing terms are as follows:
+
+1. Files in the examples/ folder
+   The files within the examples/ folder are licensed under the Creative Commons Zero v1.0 Universal (CC0-1.0) License: https://creativecommons.org/publicdomain/zero/1.0/
+
+2. Files in Python packages
+   Each Python package in this repository is licensed separately. Please refer to the LICENSE file located in each package for specific licensing terms.
+
+3. All other files
+   Unless otherwise specified, all other files in this repository are licensed under the MIT License:
+
+   MIT License
+
+   Copyright (c) 2024 Espressif Systems (Shanghai) Co. Ltd.
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in all
+   copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+   SOFTWARE.