add plugin metadata to all plugin packages

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/signals-node/package.json

@@ -1,10 +1,17 @@
 {
   "name": "@backstage/plugin-signals-node",
-  "description": "Node.js library for the signals plugin",
   "version": "0.1.5-next.2",
-  "main": "src/index.ts",
-  "types": "src/index.ts",
-  "license": "Apache-2.0",
+  "description": "Node.js library for the signals plugin",
+  "backstage": {
+    "role": "node-library",
+    "pluginId": "signals",
+    "pluginPackages": [
+      "@backstage/plugin-signals",
+      "@backstage/plugin-signals-backend",
+      "@backstage/plugin-signals-node",
+      "@backstage/plugin-signals-react"
+    ]
+  },
   "publishConfig": {
     "access": "public",
     "main": "dist/index.cjs.js",
@@ -15,24 +22,20 @@
     "url": "https://github.com/backstage/backstage",
     "directory": "plugins/signals-node"
   },
-  "backstage": {
-    "role": "node-library"
-  },
-  "scripts": {
-    "build": "backstage-cli package build",
-    "lint": "backstage-cli package lint",
-    "test": "backstage-cli package test",
-    "clean": "backstage-cli package clean",
-    "prepack": "backstage-cli package prepack",
-    "postpack": "backstage-cli package postpack"
-  },
-  "devDependencies": {
-    "@backstage/cli": "workspace:^",
-    "@types/express": "^4.17.21"
-  },
+  "license": "Apache-2.0",
+  "main": "src/index.ts",
+  "types": "src/index.ts",
   "files": [
     "dist"
   ],
+  "scripts": {
+    "build": "backstage-cli package build",
+    "clean": "backstage-cli package clean",
+    "lint": "backstage-cli package lint",
+    "prepack": "backstage-cli package prepack",
+    "postpack": "backstage-cli package postpack",
+    "test": "backstage-cli package test"
+  },
   "dependencies": {
     "@backstage/backend-common": "workspace:^",
     "@backstage/backend-plugin-api": "workspace:^",
@@ -43,5 +46,9 @@
     "express": "^4.17.1",
     "uuid": "^9.0.0",
     "ws": "^8.14.2"
+  },
+  "devDependencies": {
+    "@backstage/cli": "workspace:^",
+    "@types/express": "^4.17.21"
   }
 }