Add support for caching the Cypress downloaded package

[ntwb]

• Operating System: all
• Cypress Version: all
• Browser Version: n/a

Is this a Feature or Bug?

Feature

Current behavior:

When using a CI (Travis/Circle etc) the Cypress zip is downloaded, currently, the zip file is ~105mb for the current release https://cdn.cypress.io/desktop/1.4.1/osx64/cypress.zip

Desired behavior:

To have Cypress check a local folder to see and compare if the file located in a specific directory exists and matches the current version, if not download the latest replacing the previous.

Cypress cache could use either of these common folders, $HOME/.config or $HOME/.cache and add a Cypress folder to either of those top level folders.

How to reproduce:

n/a

Test code:

n/a

Additional Info (images, stack traces, etc)

n/a

[dschulten]

Also see #1300

[ntwb]

Closing this in favour of #1300 as it's been triaged and labeled up