Add way to make debug build

Also, add logging. You can do this with

```
DEBUG=* npm build
```

or windows

```
set DEBUG=*
npm build
```

Author: greggman

build/build.js

@@ -3,7 +3,7 @@ import fs from 'node:fs';
 
 import {execute} from './execute.js';
 import {addElemIf, appendPathIfItExists, prependPathIfItExists} from './utils.js';
-    
+
 //const __dirname = dirname(fileURLToPath(import.meta.url));
 const cwd = process.cwd(); 
 const depotToolsPath = path.join(cwd, 'third_party', 'depot_tools');
@@ -32,7 +32,7 @@ async function buildDawnNode() {
       ...addElemIf(!isWin, '-GNinja'),
       '-DDAWN_BUILD_NODE_BINDINGS=1',
       '-DDAWN_USE_X11=OFF',
-      '-DCMAKE_BUILD_TYPE=Release',
+      `-DCMAKE_BUILD_TYPE=${process.env.CMAKE_BUILD_TYPE ?? 'Release'}`,
       ...addElemIf(isWin, '-DCMAKE_SYSTEM_VERSION=10.0.26100.0'),
       ...addElemIf(isMac, '-DCMAKE_OSX_SYSROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk'),
     ]);

build/execute.js

@@ -1,7 +1,10 @@
 import {spawn} from 'child_process';
+import DEBUG from 'debug';
+const debug = DEBUG('execute');
 
 export function execute(cmd, args, options) {
   return new Promise((resolve, reject) => {
+    debug(`${cmd} ${args.join(' ')}`);
     const proc = spawn(cmd, args, {...options || {}, shell: true, stdio: 'inherit'});
     proc.on('close', function(code) {
       const result = {exitCode: code};

package-lock.json

@@ -28,6 +28,7 @@
     "index.js"
   ],
   "devDependencies": {
+    "debug": "^4.4.0",
     "mocha": "^11.0.1"
   }
 }