Remove terser as dependency (#1293)

This PR removes the terser dependency from the project, eliminating JavaScript minification capabilities and replacing them with a simpler whitespace cleanup approach.

- Removed terser dependency and import
- Replaced minification logic with regex-based empty line removal
- Updated development script to remove prettier formatting step

Fix: #1293

Author: minggangw

package.json

@@ -19,7 +19,7 @@
     "rebuild:dev": "npm run clean && node-gyp -j 16 rebuild --debug",
     "generate-messages": "node scripts/generate_messages.js",
     "generate-messages-idl": "node scripts/generate_messages.js --idl",
-    "generate-messages:dev": "node scripts/generate_messages.js --debug && npx --yes prettier --ignore-path --write generated/**/*.js",
+    "generate-messages:dev": "node scripts/generate_messages.js --debug",
     "generate-tsd-messages": "node scripts/generate_tsd.js",
     "clean": "node-gyp clean && npx rimraf ./generated",
     "install": "node scripts/install.js",
@@ -83,7 +83,6 @@
     "is-close": "^1.3.3",
     "json-bigint": "^1.0.0",
     "node-addon-api": "^8.3.1",
-    "terser": "^5.39.0",
     "walk": "^2.3.15"
   },
   "husky": {

rosidl_gen/idl_generator.js

@@ -15,7 +15,6 @@
 'use strict';
 
 const dot = require('dot');
-const { minify } = require('terser');
 const fse = require('fs-extra');
 const path = require('path');
 const parser = require('../rosidl_parser/rosidl_parser.js');
@@ -37,18 +36,8 @@ const dots = dot.process({
  * @param {string} code
  */
 async function writeGeneratedCode(dir, fileName, code) {
-  let result = null;
-  if (!isDebug && fileName.endsWith('.js')) {
-    try {
-      result = await minify(code);
-    } catch (error) {
-      console.error(`Error minifying ${fileName}:`, error);
-      result = null;
-    }
-  }
-
   await fse.mkdirs(dir);
-  await fse.writeFile(path.join(dir, fileName), result ? result.code : code);
+  await fse.writeFile(path.join(dir, fileName), code.replace(/^\s*\n/gm, ''));
 }
 
 async function generateServiceJSStruct(