add wiki for arduion dev on picocalc keyboard

wiki/Setting-Up-Arduino-Development-for-PicoCalc-keyboard.md

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+# Setting Up Arduino Development for PicoCalc keyboard
+
+This guide walks you through setting up your Arduino environment to develop for the PicoCalc keyboard (STM32F103R8T6) microcontroller using the [STM32duino Arduino Core](https://github.com/stm32duino/Arduino_Core_STM32). It also includes instructions to manually install the [XPowersLib](https://github.com/cuu/XPowersLib.git) library.
+
+## 1. Install Arduino IDE
+Download and install the latest version of [Arduino IDE](https://www.arduino.cc/en/software) for your operating system.
+
+## 2. Install STM32duino Core via Board Manager
+To use STM32 microcontrollers with Arduino, you need to install the STM32duino core.
+
+### **Steps:**
+1. Open **Arduino IDE**.
+2. Go to **File** → **Preferences**.
+3. In the **Additional Board Manager URLs** field, add the following URL:
+   ```
+   https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json
+   ```
+4. Click **OK**.
+5. Open **Tools** → **Board** → **Boards Manager**.
+6. Search for **STM32** and install **STM32 MCU based boards** by STMicroelectronics.
+
+## 3. Select the Correct Board and Settings
+Once the STM32 core is installed, configure the board settings:
+
+1. Go to **Tools** → **Board** → **STM32 Boards** → **Generic STM32F1 series**.
+2. In **Tools** menu, configure the following settings:
+   - **Board part number**: `Generic F103R8Tx`
+   - **Upload method**: `STM32CubeProgrammer(Serial)`
+
+## 4. Install XPowersLib Manually
+Instead of installing XPowersLib via the Arduino Library Manager, we will manually clone it into the correct location.
+
+### **Steps:**
+1. Open a terminal.
+2. Navigate to your Arduino libraries folder:
+   ```bash
+   cd ~/Arduino/libraries
+   ```
+3. Clone the XPowersLib repository from the correct branch:
+   ```bash
+   git clone -b stm32f103r8t6 https://github.com/cuu/XPowersLib.git
+   ```
+
+This ensures the library is correctly placed for the Arduino IDE to detect it.
+
+## 5. Get Code 
+```bash
+git clone https://github.com/clockworkpi/PicoCalc.git
+```
+the keyboard code is in `Code/picocalc_keyboard`
+
+open Code/picocalc_keyboard/picocalc_keyboard.ino in Arduino IDE 
+
+
+## 6. Upload Code to PicoCalc Keyboard
+To upload your code:
+
+1. Connect the picocalc board to your PC using a usb type-c cable.
+2. Set the DIP 1 to ON
+3. Long-Press the **Power On** button to power on.
+4. Click the **Upload** button in Arduino IDE.
+5. After upload, set DIP 1 to OFF
+
+Here is a screenshot of working arduino ide:  
+
+![screenshot](https://github.com/clockworkpi/PicoCalc/blob/master/wiki/picocalc_keyboard_arduino_ide_compile.png)
+
+
+### Libraries version info  
+
+* STM32 MCU based boards 2.10.0
+* XPowersLib 0.2.3 (cuu mod)
+