I need to move our current CI/CD workflows to a different platform. What steps should I take to ensure a smooth migration?

We ask the same underlying question in different ways.

• I need to move our current CI/CD workflows to a different platform. What steps should I take to ensure a smooth migration?
• I'm looking for a guide on how to migrate our CI/CD setup to a different platform while keeping everything running smoothly.
• I'm looking for a guide on how to safely transition our existing CI/CD processes to a different platform.