Support multiple symbolic links to executable

[innobead]

Is your feature request related to a problem? Please describe.

As titled, but right now the executable_mappings does not support multiple mapping.

executable_mappings: Some(hashmap! {
                    "xh".to_string() => "xh".to_string(),
                }),

Describe the solution you'd like

executable_mappings: Some(hashmap! {
                    "xh".to_string() => "xh xhs".to_string(),
                }),

then, xh and xhs links created and point to the original xh executable.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context or screenshots about the feature request here.