[Feat]: Enhancement the LeaderBoard searchbar

[SrinivasDevolper]

The list should be filtered every time the user enters the value in search bar on leader board section

Use:

• The user doesn't need to enter his username completely in the search bar
• It is more user-friendly

I am GSSOC24 Contributor Please assign me, I would like to work on it

[sanjay-kv]

added gssoc label, to avoid spam this repo wont be added until July end to leaderboard.