init: sudah ganti logo, hilangin setting, dan investigational use dialog

platform/cli/src/commands/utils/validateYarn.js

@@ -0,0 +1,14 @@
+import chalk from 'chalk';
+import { execa } from 'execa';
+
+export default async function validateYarn() {
+  try {
+    await execa('yarn', ['--version']);
+  } catch (err) {
+    console.log(
+      '%s Yarn is not installed, please install it before linking your extension',
+      chalk.red.bold('ERROR')
+    );
+    process.exit(1);
+  }
+}