Web ext integration for dev mode(#116)

* add web-ext dep

* create xrun tasks to wrap running extension targets

* add wait-on dep to delay launch of task when ready

* add legacy wait files for web-ext scripts

* create a dev task for next builds

* add dev:legacy task to allow for a quick dev mode

* reuse watch task to have dev env

webpack.config.ts

@@ -1,7 +1,6 @@
 /* eslint-disable @typescript-eslint/no-unsafe-call */
 import { join } from 'path';
 import * as webpack from 'webpack';
-import { CleanWebpackPlugin } from 'clean-webpack-plugin';
 import CopyPlugin from 'copy-webpack-plugin';
 
 type BrowserTypes = 'chrome' | 'firefox';
@@ -40,7 +39,6 @@ const getConfigByBrowser = (isProd: boolean, browser: BrowserTypes): webpack.Con
       path: join(__dirname, 'dist', browser),
     },
     plugins: [
-      new CleanWebpackPlugin(),
       new CopyPlugin({
         patterns: [
           { from: cssFolder, to: 'public/css' },