Add support for bulk importing uptime monitoring servers

[virtualzx-nad]

Original issue: bluewave-labs#1803

Problem:
Users need the ability to bulk import servers for uptime monitoring.

Requirements:

1. Add bulk import functionality via CSV/JSON
2. Support server configuration templates
3. Validate imported data
4. Handle duplicate entries
5. Add import status feedback
6. Include documentation

Difficulty: Beginner-friendly
Type: Enhancement