Setup hinzugefügt

Setup.md

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+# Setup
+
+## Voraussetzungen
+
+### Windows
+
+1. Git installieren
+2. Python 3.10+ installieren
+3. VS Code installieren
+4. PlatformIO IDE Extension installieren
+
+### Linux
+
+#### Ubuntu / Debian
+
+```bash
+sudo apt update
+sudo apt install -y git python3 python3-pip python3-venv
+python3 -m pip install --upgrade pip
+python3 -m pip install platformio
+```
+
+#### Arch
+
+```bash
+sudo pacman -S git python python-pip
+python -m pip install --upgrade pip
+python -m pip install platformio
+```
+
+## Repository klonen
+
+```bash
+git clone <repository-url>
+cd <projektordner>
+```
+
+## Prüfen
+
+```bash
+pio --version
+```
+
+## VS Code
+
+```bash
+code .
+```
+
+## Nächste Schritte
+
+- [Build](Build.md)
+- [Hardware](Hardware.md)
+- [Troubleshooting](Troubleshooting.md)