Add granular deletion options for recurring calendar events

[aaronsb]

Current Behavior

When deleting calendar events, the tool currently deletes all instances of a recurring event without providing options for partial deletion.

Proposed Enhancement

Add two new deletion options for recurring calendar events:

1. "Delete entire series" - removes all instances of the recurring event
2. "Delete this and following" - removes the selected instance and all future occurrences while preserving past instances

Technical Considerations

• Update the delete_workspace_calendar_event function to accept a new parameter for deletion scope
• Add validation to ensure the deletion scope is valid for the event type (recurring vs single)
• Implement proper error handling for cases where partial deletion is not possible
• Update the UI to present these options when a recurring event is selected for deletion

Impact

This enhancement will:

• Prevent accidental deletion of entire event series
• Give users more control over calendar management
• Match standard calendar application behavior
• Reduce the risk of data loss

Additional Context

This issue was identified when bulk deletion of events couldn't be stopped mid-process, highlighting the need for more granular control over event deletion.