Add a Card Pinning Feature for Enhanced User Convenience

[JainishaPathak]

Add a feature to pin cards to keep a track of important events and tasks

[OMPOL1705]

Please assign it to me.

[tripathishipra]

@JainishaPathak can you please assign me this project .

[Chakrastra]

@JainishaPathak can you please assign this issue to me?