edit core & edit event [frontend]

[nagarajpandith]

• develop form modals for editing core team and event details in admin panel.
• when edit is clicked, you need to pass that team or event details to the modal form and it should be prefilled with that data. only if there are any changes from what it was before, then make the mutation.
• also handle all kinds of errors nicely, showing them as a toast.

  Note while working on this issue, please check if #69 is closed. if it's closed, then you need to handle multiple images for an event here.

Warning dependent on two issues #58 for modal component and #59 for the backend mutation to be called

[ShreyasSaunshi]

Hi, can you assign me this issue?

[nagarajpandith]

resolved by @keerthan-ns in #76