feat(cert-checker): add Kubernetes resources for certificate checking functionality

- Implemented a new module for cert-checker with Kubernetes resources including ServiceAccount, Role, RoleBinding, ConfigMap, and CronJob.
- Added Python script to check certificate expiry and restart deployments if necessary.
- Configured environment variables for deployment name, namespace, and service details.
- Included requirements for the Python environment.

feat(devolo-exporter): introduce Devolo exporter for Prometheus metrics

- Created a new module for Devolo exporter with Kubernetes resources including ServiceAccount, ConfigMap, Deployment, and Service.
- Developed Python scripts to scrape metrics from Devolo devices and expose them to Prometheus.
- Configured environment variables for Devolo device IP, model, and ports.
- Added requirements for the Python environment.

bin/webcat

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+import sys
+import websocket
+
+if len(sys.argv) < 2:
+    print("Usage: python wsclient.py ws://localhost:9222/devtools/page/XYZ")
+    sys.exit(1)
+
+url = sys.argv[1]
+ws = websocket.WebSocket()
+ws.connect(url)
+
+print(f"Connected to {url}")
+try:
+    while True:
+        msg = input("> ")
+        if msg.lower() in {"exit", "quit"}:
+            break
+        ws.send(msg)
+        print(ws.recv())
+except KeyboardInterrupt:
+    pass
+finally:
+    ws.close()