CLI: Support multiple tasks

[ncomerci]

What Changed:

• Added mimic.yaml configuration file support for multi-task
• Added MimicConfigHandler to load and validate mimic.yaml configurations
• Added --include and --exclude flags to all CLI commands for task filtering
• Maintained backward compatibility with single-task mode when mimic.yaml doesn't exist

[lgalende]

In general, we do:

if (...) something()
// or
if (...) {
  somethingTooLongThatDoesNotFitOneLine()
}

but not:

if (...)
  somethingTooLongThatDoesNotFitOneLine()

[lgalende]

WDYT about adding the following cases to the commands tests?

• when the mimic config exists
• when the mimic config does not exist

[lgalende]

I know I requested it, but I've rolled back the constants to keep this PR clean. We can do it in a separate issue.

[lgalende]

If the command fails for one of the tasks, then the rest of the task aren't executed.
For example, if I want to deploy 10 tasks, and task-4 fails, then tasks 5 to 10 deployments don't run. Should they run anyway?