Rewrote generators to use plugin system with default plugins

internal/generator/plugins/coredhcp/coredhcp.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	configurator "github.com/OpenCHAMI/configurator/internal"
+	"github.com/OpenCHAMI/configurator/internal/util"
+)
+
+type CoreDhcp struct{}
+
+func (g *CoreDhcp) GetName() string {
+	return "coredhcp"
+}
+
+func (g *CoreDhcp) GetGroups() []string {
+	return []string{"coredhcp"}
+}
+
+func (g *CoreDhcp) Generate(config *configurator.Config, opts ...util.Option) ([]byte, error) {
+	return nil, nil
+}
+
+var Generator CoreDhcp