feat(stackoverflow-backend): migrate collator to backend system

Signed-off-by: Camila Belo <camilaibs@gmail.com>

plugins/stack-overflow-backend/package.json

@@ -5,9 +5,22 @@
   "types": "src/index.ts",
   "license": "Apache-2.0",
   "publishConfig": {
-    "access": "public",
-    "main": "dist/index.cjs.js",
-    "types": "dist/index.d.ts"
+    "access": "public"
+  },
+  "exports": {
+    ".": "./src/index.ts",
+    "./alpha": "./src/alpha.ts",
+    "./package.json": "./package.json"
+  },
+  "typesVersions": {
+    "*": {
+      "alpha": [
+        "src/alpha.ts"
+      ],
+      "package.json": [
+        "package.json"
+      ]
+    }
   },
   "backstage": {
     "role": "backend-plugin"
@@ -33,7 +46,10 @@
   },
   "dependencies": {
     "@backstage/backend-common": "workspace:^",
+    "@backstage/backend-plugin-api": "workspace:^",
+    "@backstage/backend-tasks": "workspace:^",
     "@backstage/config": "workspace:^",
+    "@backstage/plugin-search-backend-node": "workspace:^",
     "@backstage/plugin-search-common": "workspace:^",
     "node-fetch": "^2.6.7",
     "qs": "^6.9.4",
@@ -42,7 +58,6 @@
   "devDependencies": {
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
-    "@backstage/plugin-search-backend-node": "workspace:^",
     "msw": "^1.0.0"
   },
   "files": [