Refactor Cisco MAC Monitor: Implement HTTPS service and restructure code

- Removed old requirements.txt and test_new_format.py files.
- Added new src/cisco_mac_http_service.py to implement an HTTPS service for MAC monitoring.
- Introduced src/cisco_mac_monitor.py for the main MAC monitoring functionality.
- Created new requirements.txt for dependencies.
- Added example usage documentation in Docs/example.
- Updated test_new_format.py to validate new JSON output format.

Docs/example

@@ -0,0 +1,9 @@
+curl -k -X POST "https://127.0.0.1:8443/mac-monitor" \
+  -H "Content-Type: application/json" \
+  -d '{
+        "host": "10.10.0.1",
+        "username": "ZabbixROT2c",
+        "password": "xxxxxxxxxx",
+        "port": 22,
+        "timeout": 30
+      }'