Committing manifest V3 version of Reactime with working production and dev environments.

Co-authored-by: Chris LeBrett <100822842+fscgolden@users.noreply.github.com>
Co-authored-by: Robby Tipton <100332566+RobbyTipton@users.noreply.github.com>
Co-authored-by: Joseph Park <10874783+joeepark@users.noreply.github.com>
Co-authored-by: David Kim <101825171+codejunkie7@users.noreply.github.com>
Co-authored-by: Kevin HoEun Lee <14950124+khobread@users.noreply.github.com>

Author: 5 people

webpack.config.js

@@ -82,6 +82,7 @@ const config = {
 
 module.exports = (env, argv) => {
   if (argv.mode === 'development') {
+    config.devtool = 'cheap-module-source-map';
     config.plugins.push(
       new ChromeExtensionReloader({
         entries: {