Add Ollama example

Signed-off-by: Víctor Mayoral Vilches <v.mayoralv@gmail.com>

examples/agent_patterns/ollama.py

@@ -0,0 +1,28 @@
+from openai import AsyncOpenAI
+from agents import OpenAIChatCompletionsModel,Agent,Runner
+from agents.model_settings import ModelSettings
+from agents import set_default_openai_client, set_tracing_disabled
+
+external_client = AsyncOpenAI(
+    base_url = 'http://localhost:8000/v1',
+    api_key='ollama', # required, but unused
+)
+
+set_default_openai_client(external_client)
+set_tracing_disabled(True)
+
+agent = Agent(
+    name="Assistant", 
+    instructions="You are a helpful assistant",
+    model=OpenAIChatCompletionsModel(
+        model="qwen2.5:14b",
+        openai_client=external_client,
+    )
+    )
+
+result = Runner.run_sync(agent, "Write a haiku about recursion in programming.")
+print(result.final_output)
+
+# Code within the code,
+# Functions calling themselves,
+# Infinite loop's dance.