refactor:

- changed method get_agent_tools for only get_tools on agent interface
- changed OllamaModelManager to correc semantic OllamaService

test:
- added test for service initialization
- added tests to list tools and create tools into  PDF agent

src/service/ollama/ollamaService.py

@@ -0,0 +1,46 @@
+import requests
+
+from src.interfaces.models.modelInference import ModelManager
+
+
+class OllamaService(ModelManager):
+    def __init__(self, base_url = "http://localhost:11434"):
+        self.base_url = base_url
+        
+    def get_available_models(self):
+        try:
+            print(requests.__file__)
+            print(self.base_url)
+            response = requests.get(f"{self.base_url}/api/tags")
+            data = response.json()
+            return data.get('models', [])
+        except Exception as e:
+            print(f"Erro ao obter modelos: {e}")
+            return []
+
+    def get_model_details(self, model_name):
+        try:
+            
+           # Obter detalhes completos do modelo via API
+            response = requests.post(
+                f"{self.base_url}/api/show",
+                json={"name": model_name}
+            )
+            model_details = response.json()
+            
+            # O tamanho do contexto geralmente está disponível em model_details['parameters']['context_length']
+            # ou em outro campo similar dependendo do modelo
+            context_size = model_details.get('parameters', {}).get('context_length', 'Não disponível')
+            
+            # Podemos adicionar outros detalhes relevantes
+            details = {
+                "name": model_name,
+                "context_size": context_size,
+                "model_type": model_details.get('modelfile', {}).get('parameter', 'Não disponível'),
+                "license": model_details.get('license', 'Não disponível')
+            }
+            
+            return details
+        except Exception as e:
+            print(f"Error getting model details: {e}")
+            return {"name": model_name, "error": str(e)}