Add warning and example how to pass arguments to Cypress when using npm run script

[bahmutov]

I see this problem pretty often: user is trying to npm run cy:run --record ... without separating arguments with -- (should be npm run cy:run -- --record ...)

• I can run the test and record it but it is not uploading to dashboard cypress#3467

We need to put this warning in several places, because people not familiar with NPM's quirks will get stuck and frustrated. I see a couple of places where this warning could be added

• https://docs.cypress.io/guides/getting-started/installing-cypress.html#Adding-npm-scripts
• https://docs.cypress.io/guides/getting-started/installing-cypress.html#Run-binary
• https://docs.cypress.io/guides/guides/continuous-integration.html#To-record-tests
• https://docs.cypress.io/guides/references/configuration.html#Command-Line

In the existing https://docs.cypress.io/guides/guides/command-line.html#How-to-run-commands warning, we need to stress this point by adding "important"

It would be nice to create reusable warning template that we can include on demand, just like @flotwig has done with network stubbing warning in this commit 50c4c71

I have existing NPM run warning here: https://github.com/cypress-io/cypress-documentation/blob/develop/source/guides/guides/command-line.md#how-to-run-commands

Maybe we could have a shorter version of the above warning that can be inserted into more places

[bahmutov]

I think for cypress open cases we could show passing one of the options that cypress open allows see https://github.com/cypress-io/cypress-documentation/blob/develop/source/guides/guides/command-line.md#cypress-open

something like

npm run cy:open -- --config baseUrl=http://localhost:4400

[nupurgrover]

@bahmutov I would like to work on this, if this is still up for grabs

[jennifer-shehane]

@nupurgrover Yes! Is still available.

[nupurgrover]

Great! I'll submit a PR

[bhayward93]

I could do this if its still needed @jennifer-shehane

[jennifer-shehane]

@bhayward93 Yes, feel free to pick up.