feat: change folders structure (#2319)

# Summary
extract the shared example and use it in example and fabric-example, macos-example

## Test Plan

Run those apps manually.

fabric-example/package.json

@@ -0,0 +1,38 @@
+{
+  "name": "FabricExample",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "android": "react-native run-android",
+    "ios": "react-native run-ios",
+    "lint": "eslint .",
+    "start": "react-native start",
+    "test": "jest"
+  },
+  "dependencies": {
+    "react": "18.2.0",
+    "react-native": "0.74.0",
+    "react-native-reanimated": "3.9.0-nightly-20240421-474f6983d",
+    "react-native-svg": "link:../"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.20.0",
+    "@babel/preset-env": "^7.20.0",
+    "@babel/runtime": "^7.20.0",
+    "@react-native/babel-preset": "0.74.81",
+    "@react-native/eslint-config": "0.74.81",
+    "@react-native/metro-config": "0.74.81",
+    "@react-native/typescript-config": "0.74.81",
+    "@types/react": "^18.2.6",
+    "@types/react-test-renderer": "^18.0.0",
+    "babel-jest": "^29.6.3",
+    "eslint": "^8.19.0",
+    "jest": "^29.6.3",
+    "prettier": "2.8.8",
+    "react-test-renderer": "18.2.0",
+    "typescript": "5.0.4"
+  },
+  "engines": {
+    "node": ">=18"
+  }
+}