Refactor `gaia_solving_agent` to use `FunctionAgent` with updated tools, LLM integration, and refined functionality.

src/gaia_solving_agent/agent.py

@@ -128,12 +128,26 @@ You are a helpful assistant that searches Wikipedia and visit Wikipedia pages.
 )
 
 
-gaia_solving_agent = AgentWorkflow(
-    agents = [tavily_search_engine, visit_website, wikipedia_agent],
-    initial_state = dict(),
-    root_agent = tavily_search_engine.name,
-    handoff_prompt = None,
-    handoff_output_prompt = None,
-    state_prompt = None,
-    num_concurrent_runs=1,
-)
+# gaia_solving_agent = AgentWorkflow(
+#     agents = [tavily_search_engine, visit_web_page_agent, wikipedia_agent],
+#     initial_state = dict(),
+#     root_agent = tavily_search_engine.name,
+#     handoff_prompt = None,
+#     handoff_output_prompt = None,
+#     state_prompt = None,
+#     num_concurrent_runs=1,
+# )
+
+gaia_solving_agent = FunctionAgent(
+    tools = [
+        tavily_search_web,
+        *load_and_search_tools_from_toolspec(WikipediaToolSpec()),
+        *simple_web_page_reader_toolspec.to_tool_list(),
+        *RequestsToolSpec().to_tool_list(),
+    ],
+    llm=get_llm(),
+    system_prompt="""
+    You are a helpful assistant that uses tools to browse additional information and resources on the web to answer questions.
+    """,
+    name="gaia_solving_agent",
+    description="Agent that browse additional information and resources on the web.")