cleanup and update packages info

[likern]

• Remove old config files
• Remove CircleCI config
• [calendars] Improve package description
• [elements] Improve package description
• [pickers] Improve package description
• [example] Update package description
• [hooks] Update package description
• [invariants] Update package description
• [types] Improve package description
• [types-react-native] Improve package description
• [utils] Improve package description
• [types] Remove trailing space in description