cli(e2e): add clean slate option

- This allows to delete existing projects before running tests

scripts/run-e2e.ts

@@ -246,6 +246,7 @@ const runTests = async ({ name, version, ...rest }: Parameters) => {
     cwd: path.join(siblingDir, `${name}-${version}`),
   };
 
+  logger.log();
   logger.info(`🏃‍♀️ Starting for ${name} ${version}`);
   logger.log();
   logger.debug(options);
@@ -298,14 +299,19 @@ const runTests = async ({ name, version, ...rest }: Parameters) => {
 };
 
 // Run tests!
-const runE2E = (parameters: Parameters) =>
-  runTests(parameters)
+const runE2E = async (parameters: Parameters) => {
+  const { name, version } = parameters;
+  const cwd = path.join(siblingDir, `${name}-${version}`);
+  if (startWithCleanSlate) {
+    logger.log();
+    logger.info(`♻️  Starting with a clean slate, removing existing ${name} folder`);
+    await cleanDirectory({ ...parameters, cwd });
+  }
+
+  return runTests(parameters)
     .then(async () => {
       if (!process.env.CI) {
-        const { name, version } = parameters;
-        const cwd = path.join(siblingDir, `${name}-${version}`);
-
-        const { cleanup } = await prompt({
+        const { cleanup } = await prompt<{ cleanup: boolean }>({
           type: 'confirm',
           name: 'cleanup',
           message: 'Should perform cleanup?',
@@ -328,7 +334,9 @@ const runE2E = (parameters: Parameters) =>
       logger.log();
       process.exitCode = 1;
     });
+};
 
+program.option('--clean', 'Clean up existing projects before running the tests', false);
 program.option('--use-yarn-2', 'Run tests using Yarn 2 instead of Yarn 1 + npx', false);
 program.option(
   '--use-local-sb-cli',
@@ -337,7 +345,7 @@ program.option(
 );
 program.parse(process.argv);
 
-const { useYarn2, useLocalSbCli, args: frameworkArgs } = program;
+const { useYarn2, useLocalSbCli, clean: startWithCleanSlate, args: frameworkArgs } = program;
 
 const typedConfigs: { [key: string]: Parameters } = configs;
 let e2eConfigs: { [key: string]: Parameters } = {};