Tools: Improve and simplify how to build the apps (#2538)

* Improving CLI build

* Improving CLI build

* Remove requirement to build the tools

* Moved Electron app one level down

* Clean up Electron build

* Moved tools to sub-dir

* Updated root script

* update root

* update root

* update root

* update root

* update root

* update root

* Updated build

* Added doc

* Update CI config

* Should not lint index.js

* Fixing jetify

* Fixed linter errors

* Fixed pod build

* Fixed Windows build

ElectronClient/main.js

@@ -0,0 +1,40 @@
+// This is the basic initialization for the Electron MAIN process
+
+// Make it possible to require("/lib/...") without specifying full path
+require('app-module-path').addPath(__dirname);
+
+const electronApp = require('electron').app;
+const { ElectronAppWrapper } = require('./ElectronAppWrapper');
+const { initBridge } = require('./bridge');
+const { Logger } = require('lib/logger.js');
+const { FsDriverNode } = require('lib/fs-driver-node.js');
+const envFromArgs = require('./envFromArgs');
+
+process.on('unhandledRejection', (reason, p) => {
+	console.error('Unhandled promise rejection', p, 'reason:', reason);
+	process.exit(1);
+});
+
+// Likewise, we want to know if a profile is specified early, in particular
+// to save the window state data.
+function profileFromArgs(args) {
+	if (!args) return null;
+	const profileIndex = args.indexOf('--profile');
+	if (profileIndex <= 0 || profileIndex >= args.length - 1) return null;
+	const profileValue = args[profileIndex + 1];
+	return profileValue ? profileValue : null;
+}
+
+Logger.fsDriver_ = new FsDriverNode();
+
+const env = envFromArgs(process.argv);
+const profilePath = profileFromArgs(process.argv);
+
+const wrapper = new ElectronAppWrapper(electronApp, env, profilePath);
+
+initBridge(wrapper);
+
+wrapper.start().catch((error) => {
+	console.error('Electron App fatal error:');
+	console.error(error);
+});