Add remote instance management functionality and configuration support

pkg/instance/instance.go

@@ -287,3 +287,14 @@ func (i *Process) UnmarshalJSON(data []byte) error {
 
 	return nil
 }
+
+func (i *Process) IsRemote() bool {
+	i.mu.RLock()
+	defer i.mu.RUnlock()
+
+	if i.options == nil {
+		return false
+	}
+
+	return len(i.options.Nodes) > 0
+}

pkg/instance/options.go

@@ -27,6 +27,8 @@ type CreateInstanceOptions struct {
 	BackendType    backends.BackendType `json:"backend_type"`
 	BackendOptions map[string]any       `json:"backend_options,omitempty"`
 
+	Nodes []string `json:"nodes,omitempty"`
+
 	// Backend-specific options
 	LlamaServerOptions *llamacpp.LlamaServerOptions `json:"-"`
 	MlxServerOptions   *mlx.MlxServerOptions        `json:"-"`