Workflows cli create cmd issues

Got 4 bugs:
1- Treating a YAML file as a directory name
eg: workflows create hello_cli_test.yaml
the program creates a **directory** named : hello_cli_test.yaml

2- **Missing** source directories are NOT treated as errors
It is assumed that these are always present :
workflow_home/template-boilerplate/conventional-templates
workflow_home/template-boilerplate/helm-based-templates

But in the instuled model they dont exist: fs::read_dir(src)

3- Errors are swallowed instead of propagated
The **copy_directory** function, prints ERRORS, returns, and Never signal a failure
**generate_template_repo** always returns Ok(())

4- User is prompted before prerequisites are validated
eg: ould you like to store conventional WorkflowTemplate manifests? Y
Operation cannot possibly succeed because there is no template, so it should check before asking.