fix(plugin): add confirmation dialog before deleting plugin card

[Jaswanth-arjun]

Description

Currently, deleting a plugin from forms (Routes, Services, Plugin Configs) happens immediately without confirmation, which may lead to accidental data loss.

Changes

• Added confirmation dialog using modals.openConfirmModal
• Prevents accidental deletion of plugin configurations
• Aligns behavior with existing DeleteResourceBtn UX

Impact

• Improves user experience
• Ensures consistency across dashboard delete actions
• Reduces risk of unintended data loss

Related Issue

Testing

• Added plugin, confirmed delete shows confirmation modal
• Cancel button closes modal without deleting
• Confirm button deletes plugin as expected