feat(feedback-backend): add new backend system support

Author: Zaperex

plugins/feedback-backend/package.json

@@ -12,6 +12,21 @@
   "backstage": {
     "role": "backend-plugin"
   },
+  "exports": {
+    ".": "./src/index.ts",
+    "./alpha": "./src/alpha.ts",
+    "./package.json": "./package.json"
+  },
+  "typesVersions": {
+    "*": {
+      "alpha": [
+        "src/alpha.ts"
+      ],
+      "package.json": [
+        "package.json"
+      ]
+    }
+  },
   "scripts": {
     "start": "backstage-cli package start",
     "build": "backstage-cli package build",

plugins/feedback-backend/src/alpha.ts

@@ -0,0 +1 @@
+export { feedbackPlugin as default } from './plugin';