feat(tools): support Tool calls in the API (#1715)

* feat(tools): support Tools in the API

Co-authored-by: =?UTF-8?q?Stephan=20A=C3=9Fmus?= <stephan.assmus@sap.com>

* feat(tools): support function streaming

* Adhere to new return types when using tools instead of functions

* Keep backward compatibility with function calling

* Evaluate function names in chat templates

* Disable recovery with --debug

* Correctly stream out the entire result

* Detect when llm chooses to reply and to not perform any action in SSE

* Feedback from code review

---------

Co-authored-by: =?UTF-8?q?Stephan=20A=C3=9Fmus?= <stephan.assmus@sap.com>

api/api.go

@@ -146,7 +146,11 @@ func App(opts ...options.AppOption) (*fiber.App, error) {
 	}
 
 	// Default middleware config
-	app.Use(recover.New())
+
+	if !options.Debug {
+		app.Use(recover.New())
+	}
+
 	if options.Metrics != nil {
 		app.Use(metrics.APIMiddleware(options.Metrics))
 	}