Update configuration and enhance railway signal functionality

- Adjust angle parameters for switches in config.json
- Implement semaphore loading in main.py
- Refactor Lamp modes to use integers in railway_signal.py
- Add set_mode method for Lamp class to control lamp states

config.json

@@ -4,25 +4,25 @@
             "id": 1283,
             "pin": 12,
             "angle_minus": 115,
-            "angle_plus": 65
+            "angle_plus": 70
         },
         {
             "id": 1272,
             "pin": 13,
-            "angle_minus": 115,
+            "angle_minus": 110,
             "angle_plus": 65
         },
         {
             "id": 1444,
             "pin": 2,
-            "angle_minus": 115,
+            "angle_minus": 110,
             "angle_plus": 65
         },
         {
             "id": 1274,
             "pin": 3,
             "angle_minus": 115,
-            "angle_plus": 65
+            "angle_plus": 70
         },
         {
             "id": 1457,
@@ -64,5 +64,19 @@
             "id": 7007,
             "pin": 26
         }
+    ],
+    "semaphores": [
+        {
+            "id": 1,
+            "pin": 15,
+            "bpp": 4,
+            "lamps": [
+                {"color": "MOON_WHITE", "id": 1630},
+                {"color": "YELLOW", "id": 1631},
+                {"color": "RED", "id": 1632},
+                {"color": "GREEN", "id": 1633},
+                {"color": "BLUE", "id": 1634}
+            ]
+        }
     ]
 }