feat: Require confirmation or restrict pushing on master/main

**Is your feature request related to a problem? Please describe.**
Similar to how it is possible to disable force pushing, I'd like to have the same "guardrails" to prevent accidentally pushing to main/master branch.

**Describe the solution you'd like**
Ideally some confirmation step that also provides the option to create a separate branch and pushing to it instead. Being able to disable pushing onto main from lazygit would be an acceptable alternative as well.