Add conditional checks for E2E and billing tests (#34)

* Add conditional checks for E2E and billing tests

Added a conditional check to only run the End-to-End (E2E) workflow if the environment variable ENABLE_E2E_JOB is set to true. Also added a similar check in the Playwright configuration for running billing tests only if the ENABLE_BILLING_TESTS environment variable is 'true'. This will allow more control over the tests run in different environments.

apps/e2e/playwright.config.ts

@@ -1,5 +1,18 @@
 import { defineConfig, devices } from '@playwright/test';
 
+const enableBillingTests = process.env.ENABLE_BILLING_TESTS === 'true';
+
+const testIgnore: string[] = [];
+
+if (!enableBillingTests) {
+  console.log(
+    `Billing tests are disabled. To enable them, set the environment variable ENABLE_BILLING_TESTS=true.`,
+    `Current value: "${process.env.ENABLE_BILLING_TESTS}"`
+  );
+
+  testIgnore.push('*-billing.spec.ts');
+}
+
 /**
  * Read environment variables from file.
  * https://github.com/motdotla/dotenv
@@ -20,6 +33,8 @@ export default defineConfig({
   workers: process.env.CI ? 1 : undefined,
   /* Reporter to use. See https://playwright.dev/docs/test-reporters */
   reporter: 'html',
+  /* Ignore billing tests if the environment variable is not set. */
+  testIgnore,
   /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
   use: {
     /* Base URL to use in actions like `await page.goto('/')`. */