feat(extension): add VS Code extension with kanban board interface

- Complete VS Code extension with React-based kanban board UI
- MCP integration for real-time Task Master synchronization
- Professional CI/CD workflows for marketplace publishing
- Comprehensive configuration system with user preferences
- ShadCN UI components with VS Code theme integration
- Drag-and-drop task management with status transitions
- AI-powered task features via MCP protocol
- Robust error handling and connection management
- Multi-registry publishing (VS Code Marketplace + Open VSX)
- Security audit completed with hardcoded paths removed

BREAKING CHANGE: Extension requires publisher setup and marketplace keys

Publisher and extension naming decisions required:
- Update publisher field from placeholder 'DavidMaliglowka'
- Choose unique extension name (currently 'taskr-kanban')
- Select appropriate extension icon
- Configure CI secrets (VSCE_PAT, OVSX_PAT) for publishing

See apps/extension/docs/ for detailed setup instructions

apps/extension/package.mjs

@@ -0,0 +1,94 @@
+import { execSync } from 'child_process';
+import fs from 'fs-extra';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+// --- Configuration ---
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const packageDir = path.resolve(__dirname, 'vsix-build');
+// --- End Configuration ---
+
+try {
+  console.log('🚀 Starting packaging process...');
+
+  // 1. Build Project
+  console.log('\nBuilding JavaScript...');
+  execSync('pnpm run build:js', { stdio: 'inherit' });
+  console.log('\nBuilding CSS...');
+  execSync('pnpm run build:css', { stdio: 'inherit' });
+
+  // 2. Prepare Clean Directory
+  console.log(`\nPreparing clean directory at: ${packageDir}`);
+  fs.emptyDirSync(packageDir);
+
+  // 3. Copy Build Artifacts (excluding source maps)
+  console.log('Copying build artifacts...');
+  const distDir = path.resolve(__dirname, 'dist');
+  const targetDistDir = path.resolve(packageDir, 'dist');
+  fs.ensureDirSync(targetDistDir);
+  
+  // Only copy the files we need (exclude .map files)
+  const filesToCopy = ['extension.js', 'index.js', 'index.css'];
+  for (const file of filesToCopy) {
+    const srcFile = path.resolve(distDir, file);
+    const destFile = path.resolve(targetDistDir, file);
+    if (fs.existsSync(srcFile)) {
+      fs.copySync(srcFile, destFile);
+      console.log(`  - Copied dist/${file}`);
+    }
+  }
+
+  // 4. Copy additional files
+  const additionalFiles = ['README.md', 'CHANGELOG.md', 'AGENTS.md'];
+  for (const file of additionalFiles) {
+    if (fs.existsSync(path.resolve(__dirname, file))) {
+      fs.copySync(path.resolve(__dirname, file), path.resolve(packageDir, file));
+      console.log(`  - Copied ${file}`);
+    }
+  }
+
+  // 5. Copy and RENAME the clean manifest
+  console.log('Copying and preparing the final package.json...');
+  fs.copySync(path.resolve(__dirname, 'package.publish.json'), path.resolve(packageDir, 'package.json'));
+  console.log('  - Copied package.publish.json as package.json');
+
+  // 6. Copy .vscodeignore if it exists
+  if (fs.existsSync(path.resolve(__dirname, '.vscodeignore'))) {
+    fs.copySync(path.resolve(__dirname, '.vscodeignore'), path.resolve(packageDir, '.vscodeignore'));
+    console.log('  - Copied .vscodeignore');
+  }
+
+  // 7. Copy LICENSE if it exists
+  if (fs.existsSync(path.resolve(__dirname, 'LICENSE'))) {
+    fs.copySync(path.resolve(__dirname, 'LICENSE'), path.resolve(packageDir, 'LICENSE'));
+    console.log('  - Copied LICENSE');
+  }
+
+  // 7a. Copy assets directory if it exists
+  const assetsDir = path.resolve(__dirname, 'assets');
+  if (fs.existsSync(assetsDir)) {
+    const targetAssetsDir = path.resolve(packageDir, 'assets');
+    fs.copySync(assetsDir, targetAssetsDir);
+    console.log('  - Copied assets directory');
+  }
+
+  // Small delay to ensure file system operations complete
+  await new Promise(resolve => setTimeout(resolve, 100));
+
+  // 8. Final step - manual packaging
+  console.log('\n✅ Build preparation complete!');
+  console.log('\nTo create the VSIX package, run:');
+  console.log('\x1b[36m%s\x1b[0m', `cd vsix-build && pnpm exec vsce package --no-dependencies`);
+
+  // Read version from package.publish.json
+  const publishPackage = JSON.parse(fs.readFileSync(path.resolve(__dirname, 'package.publish.json'), 'utf8'));
+  const version = publishPackage.version;
+  console.log(`\nYour extension will be packaged to: vsix-build/taskr-${version}.vsix`);
+
+} catch (error) {
+  console.error('\n❌ Packaging failed!');
+  console.error(error.message);
+  process.exit(1);
+}