feat : remove organization

[JayWebtech]

Add Organization Removal Functionality

Description

This PR adds the ability to remove organizations from the BudgetChain contract. The implementation includes a new function remove_organization that allows admins to deactivate organizations by setting their is_active status to false.

Changes

• Added remove_organization function to the Budget contract
• Implemented proper storage handling for organization state updates
• Added comprehensive test coverage for the new functionality

Key Features

• Only admin can remove organizations
• Organizations are deactivated rather than deleted (soft delete pattern)
• Event emission for organization removal
• Proper storage state management

Testing

Added three test cases to verify the functionality:

1. test_remove_organization_success: Verifies successful organization removal by admin
2. test_remove_organization_not_admin: Ensures only admin can remove organizations
3. test_remove_organization_event_emission: Validates correct event emission

Technical Details

• Fixed mutable storage handling in remove_organization function
• Implemented proper storage read/write pattern for organization state updates
• Added event emission for tracking organization removals

Security Considerations

• Admin-only access control
• Soft delete pattern to maintain historical data
• Event emission for audit trail

Related Issues

Closes #52

Checklist

• Code follows the project's coding standards
• Tests are added and passing
• No breaking changes to existing functionality

[anonfedora]

Some conflicts please, @JayWebtech

[JayWebtech]

@anonfedora conflicts resolved

[anonfedora]

Thank you for your contribution ser