Add benchmark running to the pipeline

examples/ABAB_graph.jl

@@ -1,4 +1,4 @@
-using metagraph_optimization
+using MetagraphOptimization
 
 function main()
     graph = DAG()

examples/import_bench.jl

@@ -8,6 +8,10 @@ function bench_txt(filepath::String, bench::Bool = true)
     name, _ = splitext(name)
 
     filepath = joinpath(@__DIR__, filepath)
+    if !isfile(filepath)
+        println("File ", filepath, " does not exist, skipping bench")
+        return
+    end
 
     println(name, ":")
     g = import_txt(filepath)