Introduce the CommandExecutor interface to abstract command execution,
allowing for easier mocking in tests. Implement DefaultCommandExecutor
to use the os/exec package for executing commands. Update the
GenerateCosmoRouterConfig function to utilize the new
GenerateCosmoRouterConfigWithExecutor function that accepts a command
executor parameter. Add a MockCommandExecutor for simulating command
execution in unit tests with realistic behavior based on input YAML
files. This enhances test coverage and simplifies error handling.
argoyle
47dbf827f2