Add the support of URL Scheme

[quericy]

It there has any URL Scheme to launch EnPass and perform actions on search behalf ?

Just like this workflow in 1password: https://blog.agilebits.com/2015/02/03/community-goodie-workflow-chrome-for-ios-1password/

And the URL Scheme in 1pass and last pass:

• 1Password:  Onepassword://search/{DomainVariable}
• LastPass:     lastpass://search/{TextVariable}

[blue]

Well... it looks like `encase://` is still supported, though it doesn't appear to support any parameters anymore for some reason. I'm assuming - as per this doc - that it used to use UUIDs as parameters for credential items and just... doesn't now, which is super unfortunate.