Remove webpack.*.ts importing values from src/ (#4992)

webpack/get-typescript-loader.ts

@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+import esbuild from "esbuild";
+import type { Options as TSLoaderOptions } from "ts-loader";
+
+/**
+ * A function returning webpack ts/tsx loader
+ * depends on env LENS_DEV_USE_ESBUILD_LOADER to use esbuild-loader (faster) or good-old ts-loader
+ * @returns ts/tsx webpack loader configuration object
+ */
+export default function getTypescriptLoader(options: Partial<TSLoaderOptions> = {}, testRegExp?: RegExp) {
+  testRegExp ??= /\.tsx?$/; // by default covers react/jsx-stuff
+  options.transpileOnly ??= true;
+
+  if (process.env.LENS_DEV_USE_ESBUILD_LOADER === "true") {
+    console.info(`\n🚀 using esbuild-loader for ts(x)`);
+
+    return {
+      test: testRegExp,
+      loader: "esbuild-loader",
+      options: {
+        loader: "tsx",
+        target: "ES2019", // supported by >= electron@14
+        implementation: esbuild,
+      },
+    };
+  }
+
+  return {
+    test: testRegExp,
+    exclude: /node_modules/,
+    use: {
+      loader: "ts-loader",
+      options,
+    },
+  };
+}