pkg(dotnet-5.0.201): Added F#.net, F# interactive and VB.net

packages/dotnet/5.0.201/run

@@ -3,5 +3,23 @@
 # Put instructions to run the runtime
 export DOTNET_CLI_HOME=$PWD
 
-shift
-dotnet bin/Debug/net5.0/$(basename $(realpath .)).dll "$@"
+case "${PISTON_LANGUAGE}" in
+    basic)
+        ;&
+    fsharp)
+        ;&
+    csharp)
+        shift
+        dotnet bin/Debug/net5.0/$(basename $(realpath .)).dll "$@"
+        ;;
+    fsi)
+        FILENAME=$1
+        rename 's/$/\.fsx/' $FILENAME # Add .fsx extension
+        shift
+        dotnet $FSI_PATH $FILENAME.fsx "$@"
+        ;;
+    *)
+        echo "How did you get here? (${PISTON_LANGUAGE})"
+        exit 1
+        ;;
+esac