[FEATURE] BuildQueue Command should tell me if page doesn't exist

[tomasnorre]

Is your feature request related to a problem? Please describe

currently it's possible to call a page from cli that doesn't exist, without getting any notification of the problem.

Example:
When I run the command for a non-existing page:

crawler:buildQueue 9999999 deployment --depth 99 --mode exec

The following output is given:

Executing 0 requests right away:
Processing

    0 [->--------------------------]

Perhaps it is better to give an error, that the page does not exist.

Describe the solution you would like

A simple warning would be fine.

Describe alternatives you've considered

No response

Teachability, Documentation, Adoption, Migration Strategy

No response