Added share link shells and import process.

[sebas5384]

Scenario "Sharing a shell to a friend":

1. Click at the local actions of a shell item and click in share.
2. Send it to a friend which haves the Hades installed.

Scenario "A friend is sharing a shell with me":

1. Click at the link shell://kashd87as979asd9asd...
2. Hades will open and import the shell into your ~/.ssh/config.

In order to test it you must run npm run package