Ui containerlab integration

Description

Integrating the web ui into the existing container lab.

Steps to test

Execute the following command make containerlab-slim-start. After the build process the web ui should be available on localhost:8088. The poc is to open the website and try to login with the default credentials provided by gosdn

Merge Process

This MR only contains the commits related to the web ui integration into container lab for a better overview/review experience

go.mod

@@ -25,7 +25,7 @@ require (
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/stretchr/testify v1.10.0
 	go.mongodb.org/mongo-driver/v2 v2.0.0
-	golang.org/x/sync v0.10.0
+	golang.org/x/sync v0.11.0
 	google.golang.org/grpc v1.70.0
 	google.golang.org/protobuf v1.36.4
 	gopkg.in/yaml.v3 v3.0.1