make a list of [ssid,pass] (set by the user) that will be used when trying to connect to a wifi network (like checks if the ssid in the list matches and if try to use the given password)

Roadmap:

• create a file in LittleFS to store these information like "SSID,pwd\nSSID2,pwd\n"
• after scan the networks, if some SSID is already known, try to connect for 5 tries
• if doesn't work, ask the new password
• save/replace the password in the file (replacing may be the hardest thing, imho)