chore: add consistent start targets and Makefiles across examples

Author: mridang

Makefile

@@ -0,0 +1,5 @@
+.PHONY: start
+
+start:
+	npm install
+	npm start

README.md

@@ -99,7 +99,9 @@ cd example-auth-hono
 npm install
 
 # 3. Start the development server
-npm run dev
+npm start
+# or
+make start
 ```
 
 The application will now be running at `http://localhost:3000`.

package.json

@@ -3,12 +3,12 @@
   "main": "index.js",
   "scripts": {
     "prepack": "tsc",
+    "start": "tsx watch -r dotenv/config src/index.ts",
     "dev": "tsx watch -r dotenv/config src/index.ts",
     "build": "tsc",
     "test": "jest --verbose --config=jest.config.mjs --runInBand",
     "test:watch": "npm run test -- --watch",
     "test:debug": "jest --verbose --config=jest.config.mjs --runInBand --detectOpenHandles",
-    "start": "node dist/index.js",
     "format": "prettier --write .",
     "format:check": "prettier --check .",
     "lint": "eslint .",