Add LICENSE and README.md

README.md

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+# Let's Swamp
+
+![Version](https://img.shields.io/badge/PCB%20Version-0.3-blue.svg)
+![KiCAD design License:MIT](https://img.shields.io/badge/KiCAD%20design%20License-MIT-brightgreen.svg)
+<!-- ![Gerber:CC-BY-NC](https://img.shields.io/badge/Gerber%20License-CC--BY--NC-blue.svg) -->
+
+DIY keyboard "Let's Swamp"
+
+![Let's Swamp v0.2proto](./images/let's-swamp-v02.jpg)
+
+---
+
+## ⌨️What is "Let's Swamp" ?
+
+Let's Swamp is an ortholinear split keyboard.
+
+![Let's Swamp v0.2proto](./images/kle-let's-swamp.png)
+
+ * 4x6x2=48keys
+ * Controller board : Waveshare RP2040-Zero
+ * Supported firmware :
+    - [Kermite](https://kermite.org/)
+    - [PRK Firmware](https://github.com/picoruby/prk_firmware)
+    - [QMK Firmware](https://docs.qmk.fm/#/)
+
+---
+
+## 📃License
+
+ * KiCad design files (in [`design`](./design/) directory) : MIT
+<!--
+ * Gerber files (in `gerber` directory)  : CC-BY-NC
+-->
+ * Other files: MIT
+
+I have modified [Salicylic-acid3/KiCAD_FootPrint](https://github.com/Salicylic-acid3/KiCAD_FootPrint) to use in this project.

design/LICENSE

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+MIT License
+
+Copyright (c) 2023 alg
+
+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.