Add Hetzner Cloud server template example (#560)

## Description

This PR adds a template example for the Hetzner Cloud Sever. 


This video shows the provisioning of multiple hetzner instances in coder
with dynamic param enabled, running simultaneously and shown in the
Hetzner console, checking labels on both the OS Filesystem and on the
hetzner console and then shutting down through coder demonstrating clean
up on hetzner and deleting workspaces without errors
DEMO VIDEO:
https://drive.google.com/file/d/1JkhjszCRM9K27XDlMi_2nXtJosoflns_/view?usp=sharing

## Type of Change

- [ ] New module
- [x] New template
- [ ] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other


## Template Information

**Path:** `registry/Excellencedev/templates/hetzner-linux`

## Testing & Validation

- [x] Tests pass (`bun test`)
- [x] Code formatted (`bun fmt`)
- [x] Changes tested locally

## Related Issues
/closes #209 
/claim #209

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: DevCats <christofer@coder.com>

.github/typos.toml

@@ -3,6 +3,7 @@ muc = "muc" # For Munich location code
 tyo = "tyo" # For Tokyo location code
 Hashi = "Hashi"
 HashiCorp = "HashiCorp"
+hel = "hel" # For Helsinki location code
 mavrickrishi = "mavrickrishi" # Username
 mavrick = "mavrick" # Username
 inh = "inh" # Option in setpriv command