add Hetzner Cloud Template

[Harsh9485]

Closes #209
/claim #209

Description

This PR introduces a new Coder template for provisioning virtual machines on Hetzner Cloud, complete with:

• Private networking via hcloud_network
• Attached volumes per server
• A running Coder agent per workspace
• Optional integration with the code-server module

The template is located under registry/[your-username]/templates/hetzner-cloud and is fully self-contained.

It enables developers to launch Coder workspaces on Hetzner Cloud infrastructure with minimal setup and customizable options like instance type, volume size, and region.

Type of Change

• New module
• Bug fix
• Feature/enhancement
• Documentation
• Other

Module Information

Path: registry/[namespace]/modules/[module-name]
New version: v1.0.0
Breaking change: [ ] Yes [x] No

Testing & Validation

• Tests pass (bun test)
• Code formatted (bun run fmt)
• Changes tested locally

Related Issues

[Harsh9485]

Hey @matifali, sorry, this PR isn’t complete yet.
Could you please wait until I finish it?
I’m new to this awesome project and still trying to understand it. It’s taking some time, but I promise I’ll submit a solid PR.