packages,plugins: use backend:build for all backend packages + publish config and no tsconfig

plugins/scaffolder-backend/package.json

@@ -5,8 +5,14 @@
   "types": "src/index.ts",
   "license": "Apache-2.0",
   "private": true,
+  "publishConfig": {
+    "access": "public",
+    "main": "dist/index.cjs.js",
+    "types": "dist/index.d.ts"
+  },
   "scripts": {
-    "build": "tsc",
+    "start": "backstage-cli backend:dev",
+    "build": "backstage-cli backend:build",
     "lint": "backstage-cli lint",
     "test": "backstage-cli test",
     "prepack": "backstage-cli prepack",

plugins/scaffolder-backend/tsconfig.json

@@ -1,16 +0,0 @@
-{
-  "include": ["src"],
-  "compilerOptions": {
-    "outDir": "dist",
-    "incremental": true,
-    "sourceMap": true,
-    "declaration": true,
-    "strict": true,
-    "target": "es2019",
-    "module": "commonjs",
-    "esModuleInterop": true,
-    "allowJs": true,
-    "lib": ["es2019"],
-    "types": ["node", "jest", "webpack-env"]
-  }
-}