feat: Add ci.skip push option to mob next

[heidiberry]

Users can configure MOB_SKIP_CI_PUSH_OPTION_ENABLED so the ci.skip push option is added when running mob start.

This pull request extends this configuration to include ci.skip when running mob next.

[philwolstenholme]

Thanks for making this MR @heidiberry :)

Heidi and I work at the same org but in different teams. My team uses mob.sh daily, and Heidi's team manages the CI infrastructure that is currently working overtime because our mob next pushes aren't using the ci.skip option.

@hollesse other than a green CI run once the workflow has been approved, is there anything else you'd like to see from this before it could be merged? I don't mind contributing any docs changes or extra tests if you'd like to see them.

[hollesse]

Hi @philwolstenholme and @heidiberry

Thank you for your contribution. We added the push option, when creating the new mob branch, as we did not have a proper way to skip ci with an adjusted commit message here. In the case of mob next, we have a commit message, which includes different kind of ci skip. Here you can see how the default mob next commit message looks like: "mob next [ci-skip] [ci skip] [skip ci]" Does your CI system does not support skiping CI job with one of these text fragments in the commit message?

Right now I did not have enough time to think about you suggested changes and the potential impact. Therefore please have a look if you could instead just use the ci-skip within the commit message, as a workaround.