Add flag --name in capture command

[alegrey91]

We need the ability to assign custom names to meta files created by harpoon when capturing.
This because if we run the following command (several times with different flags/args):

harpoon capture -f main.main ./command args --flags

The main.main symbol will be override every time we iterate the command with different flags/args.
We need the ability of specifying a different name from the default one.