Add Delete election functionality

Description

Add delete election functionality - user can only able to delete the election in two condition

1. Election is pending
2. Only organisation can delete election

YT link for demo - https://youtu.be/ji3zWs4ThJU

Type of change

Please mark the options that are relevant.

• Updated UI/UX
• Improved the business logic of code
• Added new feature
• Other

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings