menu-driven command line interface for configuring

[txoof]

Is your feature request related to a problem? Please describe.
Add a command line interface for adding, removing and configuring plugins. Use the same interface to configure the main section of the config as well.

Describe the solution you'd like
Add a function that can help users configure plugins by displaying fields, descriptions and checking for reasonable values. The interface should also reveal the user-facing helper functions that some plugins have (e.g. LMS search, lat/lon lookup). This should be a menu driven interface with yes/no questions, prompts for input.

Describe alternatives you've considered
The JSON config file that will be rolled out in 0.6 is terrible to edit by hand

[txoof]

Update documentation for plugin configuration

• Plugin documentation needs to be updated to indicate how to add/enable/disable plugins

Build menu driven interface for configuring JSON configuration

• add method for configuring display
• add method for (re)configuring plugins
• add function for returning user facing functions easily that provides: method_name, description, params :[param1 name, type, description...] - see library.get_help
• need a method for deleting plugin configurations that are no longer needed; it is only possible to disable them at this time

Connect menu driven interface to PaperPi from command line

• add command line switch to launch configuration
• add option to edit user or system version
• remind user of backups

[txoof]

see also #123 #130

rewrite user facing functions to have defined key-word args and also accept args and kwargs.

def get_coord(place=None, *args, **kwargs):
    '''USER FACING HELPER FUNCTION:
    lookup and print the latitude, longitude of a place given as a string:
    
    usage: --run_plugin_func met_no.get_coord "Horsetooth Reservoir, Fort Collins CO, USA"
    
    Args:
        place(`str`): "City, Provence, Country
    
    Returns:
        `tuple`: lat, lon
        
    Example:
        get_coord("Denver, Colorado, USA")
        get_coord("Bamako, Mali")
        %U'''
    
#     if args:
#         place = args[0]
#     elif 'place' in kwargs:
#         place = kwargs['place']
#     else:
#         place = None
....
      return (lat, lon)

[txoof]

weird crash when running from command line:

Traceback (most recent call last):
  File "/home/pi/src/PaperPi/paperpi/./paperpi.py", line 482, in <module>
    exit_code = main()
                ^^^^^^
  File "/home/pi/src/PaperPi/paperpi/./paperpi.py", line 365, in main
    interactive_config.interactive_config(config, backup_notify=True)
  File "/home/pi/src/PaperPi/paperpi/interactive_config.py", line 800, in interactive_config
    function(**kwargs)
  File "/home/pi/src/PaperPi/paperpi/interactive_config.py", line 658, in plugin_configuration
    configured_plugin, plugin_index = _configure_plugin(config_json, plugin_name)
                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/pi/src/PaperPi/paperpi/interactive_config.py", line 533, in _configure_plugin
    module_json, config_index = _find_plugin_config(config_json, plugin_name)
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/pi/src/PaperPi/paperpi/interactive_config.py", line 345, in _find_plugin_config
    if plugin_name in plugin.get('plugin', {}).get('value', ''):
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'str' object has no attribute 'get'

This does not appear to happen when running in Jupyter.

Steps to reproduce:

1. paperpi.py -i
2. option (1) Configure Plugins
3. configure a plugin? y
4. (8) moon phase
5. Run helper function? y
6. (2) list_country_locales
7. NL
8. run one of the helper functions? n
9. CRASH