Add Linux development station role with systemd services for code-server and OpenCode

- Implemented handlers for restarting code-server and OpenCode services.
- Created main tasks for setting up a Linux development station, including user management, package installation, and configuration.
- Added validation for OpenCode server credentials and code-server password.
- Introduced tool package management for npm, uv, and go installers.
- Developed templates for systemd service units for code-server and OpenCode.
- Included scripts for starting code-server and OpenCode with SSH agent support.
- Updated inventory and Terraform configuration to include new development host.

ansible/roles/llama_server/files/scripts/linux/llama_hf_sync.py

@@ -120,6 +120,8 @@ def _normalize_preset_options(options: dict[str, Any], scope: str) -> dict[str,
     normalized: dict[str, str] = {}
     for key, value in options.items():
         key_str = str(key).strip()
+        # convert _ to - for compatibility with llama.cpp router preset format
+        key_str = key_str.replace("_", "-")
         if not key_str:
             raise RuntimeError(f"{scope} preset option keys must be non-empty")
         if value is None: