Balance in README hinzugefügt

README.md

@@ -14,6 +14,7 @@ It is built with Go and uses a simple configuration file to store your API setti
   - `klog config insecure <true|false>` – ignore self-signed SSL certs  
   - `klog config show` – show current configuration  
   - `klog c` (aliases: `klog k`, `klog coffee`, `klog kaffee`) – log a coffee
+  - `klog balance` – shows your balance
   - `klog brew <waterIn> [--notify=<true|false>] [--plan=<true|false>] [--planTime=<minutes>]` – log a brew with options
 
 - **Formatted output**  
@@ -52,6 +53,11 @@ klog config url https://example.com/
 klog config show
 ```
 
+### Show your balance
+```bash
+klog balance
+```
+
 ### Log events
 
 ```bash