frontend-defaults: move public sign-in app to alpha app module

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

plugins/app/package.json

@@ -11,9 +11,7 @@
     ]
   },
   "publishConfig": {
-    "access": "public",
-    "main": "dist/index.esm.js",
-    "types": "dist/index.d.ts"
+    "access": "public"
   },
   "repository": {
     "type": "git",
@@ -22,6 +20,21 @@
   },
   "license": "Apache-2.0",
   "sideEffects": false,
+  "exports": {
+    ".": "./src/index.ts",
+    "./alpha": "./src/alpha/index.ts",
+    "./package.json": "./package.json"
+  },
+  "typesVersions": {
+    "*": {
+      "alpha": [
+        "src/alpha/index.ts"
+      ],
+      "package.json": [
+        "package.json"
+      ]
+    }
+  },
   "main": "src/index.ts",
   "types": "src/index.ts",
   "files": [
@@ -47,12 +60,15 @@
     "@material-ui/core": "^4.9.13",
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "^4.0.0-alpha.61",
+    "@react-hookz/web": "^24.0.0",
     "react-use": "^17.2.4"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",
     "@backstage/dev-utils": "workspace:^",
+    "@backstage/frontend-defaults": "workspace:^",
     "@backstage/frontend-test-utils": "workspace:^",
+    "@backstage/test-utils": "workspace:^",
     "@testing-library/jest-dom": "^6.0.0",
     "@testing-library/react": "^16.0.0",
     "@testing-library/user-event": "^14.0.0",