Support wrangler.json configuration file in adapter-cloudflare-workers (#13148)

* feat: support wrangler.json

* feat: Find the wrangler.json if the default config not found

* Update packages/adapter-cloudflare-workers/index.js

---------

Co-authored-by: Tee Ming <[email protected]>

Author: linnil1

documentation/docs/25-build-and-deploy/70-adapter-cloudflare-workers.md

@@ -34,15 +34,15 @@ export default {
 
 ### config
 
-Path to your custom `wrangler.toml` config file.
+Path to your custom `wrangler.toml` or `wrangler.json` config file.
 
 ### platformProxy
 
 Preferences for the emulated `platform.env` local bindings. See the [getPlatformProxy](https://developers.cloudflare.com/workers/wrangler/api/#syntax) Wrangler API documentation for a full list of options.
 
 ## Basic Configuration
 
-This adapter expects to find a [wrangler.toml](https://developers.cloudflare.com/workers/platform/sites/configuration) file in the project root. It should look something like this:
+This adapter expects to find a [wrangler.toml/wrangler.json](https://developers.cloudflare.com/workers/platform/sites/configuration) file in the project root. It should look something like this:
 
 ```toml
 /// file: wrangler.toml

packages/adapter-cloudflare-workers/index.js

@@ -185,14 +185,24 @@ export default function ({ config = 'wrangler.toml', platformProxy = {} } = {})
  * @returns {WranglerConfig}
  */
 function validate_config(builder, config_file) {
+	if (!existsSync(config_file) && config_file === 'wrangler.toml' && existsSync('wrangler.json')) {
+		builder.log.minor('Default wrangler.toml does not exist. Using wrangler.json.');
+		config_file = 'wrangler.json';
+	}
 	if (existsSync(config_file)) {
 		/** @type {WranglerConfig} */
 		let wrangler_config;
 
 		try {
-			wrangler_config = /** @type {WranglerConfig} */ (
-				toml.parse(readFileSync(config_file, 'utf-8'))
-			);
+			if (config_file.endsWith('.json')) {
+				wrangler_config = /** @type {WranglerConfig} */ (
+					JSON.parse(readFileSync(config_file, 'utf-8'))
+				);
+			} else {
+				wrangler_config = /** @type {WranglerConfig} */ (
+					toml.parse(readFileSync(config_file, 'utf-8'))
+				);
+			}
 		} catch (err) {
 			err.message = `Error parsing ${config_file}: ${err.message}`;
 			throw err;