feat: migrate from Webpack to esbuild for optimized builds

- Updated build process to use esbuild, enhancing performance and reducing bundle size.
- Introduced custom esbuild plugins to replicate Webpack functionality, including removal of duplicate tslib helpers.
- Replaced the previous build script for ES5 with a new optimized version using esbuild.
- Added support for TypeScript in esbuild configuration, ensuring compatibility with existing code.
- Removed Webpack-related dependencies and configurations from package.json and renovate.json.

This transition aims to streamline the build process and improve overall efficiency.

scripts/build/esbuild-plugins.js

@@ -0,0 +1,36 @@
+// Custom esbuild plugins to replace webpack functionality
+
+/**
+ * Plugin to remove duplicate tslib helpers that TypeScript might emit
+ * Works with both .js and .ts files for comprehensive coverage
+ */
+const removeTslibHelpersPlugin = {
+  name: 'remove-tslib-helpers',
+  setup(build) {
+    // Handle both JavaScript and TypeScript files
+    build.onLoad({ filter: /\.(js|ts)$/ }, async (args) => {
+      const fs = require('fs');
+      const path = require('path');
+      const contents = await fs.promises.readFile(args.path, 'utf8');
+
+      // Remove the __extends method that is added automatically by typescript
+      const transformedContents = contents.replace(
+        /var\s__extends\s=\s\(this\s&&[\sa-z\._\(\)\|{}=:\[\]&,;?]+}\)\(\);/i,
+        ''
+      );
+
+      // Determine the correct loader based on file extension
+      const ext = path.extname(args.path);
+      const loader = ext === '.ts' ? 'ts' : 'js';
+
+      return {
+        contents: transformedContents,
+        loader: loader,
+      };
+    });
+  },
+};
+
+module.exports = {
+  removeTslibHelpersPlugin,
+};