Proposal: Add cy.catch command to prevent failed Cypress commands from failing the test

[flotwig]

Current behavior:

There is no way to catch failed commands in a Cypress test. Any failed command fails the entire test. If you want to catch a failed command for a legitimate reason, ugly workarounds must be used: percy/percy-cypress#140

And options to use duck-typing to return errors must be added on a per-command basis: #3161 (comment)

Desired behavior:

Add cy.catch command which can be chained to any Cypress command, and will be short-circuited to if an error is thrown in the chain preceding it.

Similar to Promise.catch:

cy.catch((err) => { ... })
cy.catch({ code: 'ECONNRESET' }, (err) => { ... })