feat: add app name verification to all golang plugins

Moving verification of input to the earliest place is the best way to decrease the need to validate this further downstream.

Additionally, some of the existing checks were.... lacking :)

plugins/network/subcommands.go

@@ -142,6 +142,10 @@ func CommandReport(appName string, infoFlag string) error {
 
 // CommandSet set or clear a network property for an app
 func CommandSet(appName string, property string, value string) error {
+	if err := common.VerifyAppName(appName); err != nil {
+		return err
+	}
+
 	if property == "bind-all-interfaces" && value == "" {
 		value = "false"
 	}