[FEAT] Add confirmation popup for stop hosting action

[kacime]

Description

Add a confirmation popup when user selects "Stop Hosting" from the user menu instead of immediately stopping the hosting service.

Requirements

• Display confirmation popup when "Stop Hosting" is clicked
• Include warning message about shelter deletion and resource cleanup
• Provide Cancel and Confirm action buttons
• Add feedback collection link below the main actions

Popup Content

Title: Stop Hosting Confirmation

Message:
You want to stop hosting your shelter?
Stopping means your shelter will be deleted.
Your drive will be clean, and we won't use your resources (storage or bandwidth) anymore.

Actions:

• Cancel button (closes popup, no action)
• Confirm button (proceeds with stop hosting)

Footer:

• Link: "Need something else? Tell us more" (opens feedback form)

Acceptance Criteria

• Popup appears when "Stop Hosting" is clicked
• Popup displays the exact warning message
• Cancel button closes popup without stopping hosting
• Confirm button proceeds with hosting termination
• Feedback link opens appropriate feedback collection interface
• Popup is properly styled and responsive
• User can close popup with ESC key or clicking outside (same as Cancel)