feature: show pitches nearby a zone

[iamgiolaga]

Discussed in #14

^{Originally posted by iamgiolaga November 12, 2022}
It would be great to extend the bot such that a geographical area can be set and propose a set of pitches nearby

Open points:

• how to manage the input of pitch choice
• how to show the list of pitches
• how to manage the input of the geographical area (CAP? Name?)