tsconfig: switch to top-level type checking

package.json

@@ -8,7 +8,8 @@
     "start": "yarn workspace example-app start",
     "bundle": "yarn build && yarn workspace example-app bundle",
     "build": "lerna run build",
-    "clean": "lerna run clean",
+    "tsc": "tsc",
+    "clean": "backstage-cli clean && lerna run clean",
     "diff": "lerna run diff --",
     "test": "yarn build && lerna run test --since origin/master -- --coverage",
     "test:all": "yarn build && lerna run test -- --coverage",

tsconfig.json

@@ -1,3 +1,10 @@
 {
-  "extends": "@backstage/cli/config/tsconfig.json"
+  "extends": "@backstage/cli/config/tsconfig.json",
+  "include": ["packages/*/src", "plugins/*/src", "plugins/*/dev"],
+  "exclude": ["**/node_modules"],
+  "compilerOptions": {
+    "noEmit": false,
+    "emitDeclarationOnly": true,
+    "outDir": "dist"
+  }
 }