feat(crush): add claude-sonnet-4.5 model to copilot provider

Author: jmarcelomb

.config/crush/crush.json

@@ -300,6 +300,16 @@
           "context_window": 200000,
           "default_max_tokens": 4000
         },
+        {
+          "id": "claude-sonnet-4.5",
+          "name": "copilot-claude-sonnet-4.5",
+          "cost_per_1m_in": 0.0,
+          "cost_per_1m_out": 0.0,
+          "cost_per_1m_in_cached": 0.0,
+          "cost_per_1m_out_cached": 0.0,
+          "context_window": 200000,
+          "default_max_tokens": 4000
+        },
         {
           "id": "gpt-4.1-2025-04-14",
           "name": "copilot-gpt-4.1-2025-04-14",