Add SteinerTree CLI examples

Author: GiggleLiu

docs/src/cli.md

@@ -45,6 +45,9 @@ pred create MIS --graph 0-1,1-2,2-3 -o problem.json
 # Create a weighted instance (variant auto-upgrades to i32)
 pred create MIS --graph 0-1,1-2,2-3 --weights 3,1,2,1 -o weighted.json
 
+# Create a Steiner Tree instance
+pred create SteinerTree --graph 0-1,0-3,1-2,1-3,2-3,2-4,3-4 --edge-weights 2,5,2,1,5,6,1 --terminals 0,2,4 -o steiner.json
+
 # Or start from a canonical model example
 pred create --example MIS/SimpleGraph/i32 -o example.json
 
@@ -272,6 +275,7 @@ pred create QUBO --matrix "1,0.5;0.5,2" -o qubo.json
 pred create KColoring --k 3 --graph 0-1,1-2,2-0 -o kcol.json
 pred create SpinGlass --graph 0-1,1-2 -o sg.json
 pred create MaxCut --graph 0-1,1-2,2-0 -o maxcut.json
+pred create SteinerTree --graph 0-1,0-3,1-2,1-3,2-3,2-4,3-4 --edge-weights 2,5,2,1,5,6,1 --terminals 0,2,4 -o steiner.json
 pred create Factoring --target 15 --bits-m 4 --bits-n 4 -o factoring.json
 pred create Factoring --target 21 --bits-m 3 --bits-n 3 -o factoring2.json
 ```