Change function result type from string to any

Updated the return type of functions and related code from `string` to `any` to improve flexibility and support more diverse outputs. Adjusted function implementations, signatures, and handling of results accordingly.

llm.go

@@ -2,6 +2,7 @@ package go_llm
 
 import (
 	"context"
+	"fmt"
 
 	"github.com/sashabaranov/go-openai"
 )
@@ -142,7 +143,7 @@ func (t ToolCall) toChatCompletionMessages() []openai.ChatCompletionMessage {
 
 type ToolCallResponse struct {
 	ID     string
-	Result string
+	Result any
 	Error  error
 }
 
@@ -167,7 +168,7 @@ func (t ToolCallResponse) toChatCompletionMessages() []openai.ChatCompletionMess
 
 	if refusal != "" {
 		if t.Result != "" {
-			t.Result = t.Result + " (error in execution: " + refusal + ")"
+			t.Result = fmt.Sprint(t.Result) + " (error in execution: " + refusal + ")"
 		} else {
 			t.Result = "error in execution:" + refusal
 		}
@@ -175,7 +176,7 @@ func (t ToolCallResponse) toChatCompletionMessages() []openai.ChatCompletionMess
 
 	return []openai.ChatCompletionMessage{{
 		Role:       openai.ChatMessageRoleTool,
-		Content:    t.Result,
+		Content:    fmt.Sprint(t.Result),
 		ToolCallID: t.ID,
 	}}
 }