single station support for Eneco, switch source Shell / Eneco

[myTselection]

currently single station only supported for Shell serial number
no solution found yet to add Eneco serial number and fetch specific station info (workaround: provide exact coordinates or address of desired station to make sure it becomes the 'nearest')

Shell lookup in area should also be possible

Example url's
url_shell = f"https://ui-map.shellrecharge.com/api/map/v2/markers/{lon_min}/{lon_max}/{lat_min}/{lat_max}/{zoomlevel}"
#only shell card
url_shell = f"https://ui-map.shellrecharge.com/api/map/v2/markers/4.807961539062489/4.972756460937489/52.35012933719833/52.39786576367266/14/available,unavailable,occupied,unknown/TepcoCHAdeMO,Type2,Type3,Type1,Type2Combo,Domestic/3.3/excludeUnsupportedTokens"
#only available and shell card
url_shell = f"https://ui-map.shellrecharge.com/api/map/v2/markers/4.807961539062489/4.972756460937489/52.35012933719833/52.39786576367266/14/available/TepcoCHAdeMO,Type2,Type3,Type1,Type2Combo,Domestic/3.3/excludeUnsupportedTokens"
#using locationUid
locationUid = 5293763
url_shell_location_details = f"https://ui-map.shellrecharge.com/api/map/v2/locations/{locationUid}"