Weather.jsx: Add loading skeleton instead of plain text

[Hrishikesh-Dalal]

Replace plain text placeholders with a loading skeleton component while fetching weather data to improve user experience during data load.

[Priya-creates]

Hi @Hrishikesh-Dalal ! I would like to work on this issue. Could you please assign it to me?

[Priya-creates]

Thanks for assigning! Starting out right away.

[Priya-creates]

Hi @Hrishikesh-Dalal ! I have submitted my PR, kindly review it.