improve prompting in moon phase plugin when running helper functions

[txoof]

Is your feature request related to a problem? Please describe. The locale function for the moon phase plugin expects input, but it isn't clear:

==.....list_country_locales.....==

    Print the timezones for a country using the 2-letter ISO country code

    This plugin uses a "timezone locale" to calculate the moon rise and moon set values.
    Timezone locales are fomatted as 'landmass/city'. If you are not familiar with your
    locale, use this tool to find the name. Enter the two-letter code for a country to
    list all of the locales:

    Example for Brazil:
        Timezone Locales for BR

        America/Noronha       America/Bahia         America/Boa_Vista
        America/Belem         America/Sao_Paulo     America/Manaus
        America/Fortaleza     America/Campo_Grande  America/Eirunepe
        America/Recife        America/Cuiaba        America/Rio_Branco
        America/Araguaina     America/Santarem
        America/Maceio        America/Porto_Velho


___________________________________________________________________________
NL # input is expected here, but that's not obvious```

**Describe the solution you'd like**
Improve the prompt to include something like "enter the a letter country code"