feat: add engine and webhook server framework code.

pkg/engine/engine.go

@@ -0,0 +1 @@
+package engine

pkg/webhook/handlers/resource.go

@@ -0,0 +1 @@
+package handlers

pkg/webhook/server.go

@@ -0,0 +1,15 @@
+// Webhook Server is used to
+package webhook
+
+import "net/http"
+
+type Server interface {
+	// Run TLS server in separate thread and returns control immediately
+	Run(<-chan struct{})
+	// Stop TLS server and returns control after the server is shut down
+	Stop()
+}
+
+type server struct {
+	server http.Server
+}