feat: add eta engine

Author: beatyt

packages/engines/src/components/EtaEngine.ts

@@ -0,0 +1,12 @@
+import {ViewEngine} from "../decorators/viewEngine";
+import {Engine} from "./Engine";
+
+@ViewEngine("eta", {
+  requires: "eta"
+})
+export class EtaEngine extends Engine {
+  protected $compile(template: string, options: any) {
+    const eta = this.engine;
+    return () => eta.renderString(template, options);
+  }
+}