Add dependencies and runtime setup documentation

README.md

@@ -0,0 +1,20 @@
+# SAB Taetigkeitsnachweise Tool
+
+## Setup
+
+1. Create and activate a virtual environment.
+2. Install dependencies:
+
+```bash
+pip install -r requirements.txt
+```
+
+## Local run command
+
+Use module execution from the project root:
+
+```bash
+python -m src.taetigkeitsnachweis.cli --version
+```
+
+Current CLI is a scaffold. Full generation pipeline is implemented in later tasks.