Use cwd-relative path in @electron/packager resedit patch

The patch hardcoded a local Windows path, breaking Windows CI builds. Now resolves tools/resedit.js relative to process.cwd() and uses process.execPath instead of 'node'. Also drops the deb maker diagnostic step now that Linux builds pass.

.github/workflows/build.yml

@@ -79,13 +79,6 @@ jobs:
           DISK_URL: ${{ secrets.DISK_URL }}
       - name: Install
         run: npm ci
-      - name: Diagnose deb maker
-        if: matrix.os == 'ubuntu-latest'
-        run: |
-          node -e "const r=require('module').createRequire(require.resolve('@electron-forge/maker-base/package.json'));try{r('electron-installer-debian');console.log('OK from maker-base')}catch(e){console.error('FAIL from maker-base:',e)}"
-          node -e "const {MakerDeb}=require('@electron-forge/maker-deb');const m=new MakerDeb({});console.log('isSupported:',m.isSupportedOnCurrentPlatform());try{m.ensureExternalBinariesExist();console.log('binaries OK')}catch(e){console.error('binaries:',e.message)}"
-          ls -la node_modules/electron-installer-debian/ || echo "NOT INSTALLED"
-          which dpkg fakeroot || echo "missing binaries"
       - name: Make
         if: startsWith(github.ref, 'refs/tags/')
         run: npm run make -- --arch=${{ matrix.arch }}