feat: replace Cypress with Playwright-only E2E testing

- Remove all Cypress files and configuration (cypress/, cypress.env.json, *.cy.ts)
- Update package.json scripts to use only Playwright for CI commands
- Configure Playwright to handle both webpack (legacy) and rspack modes via LEGACY_MODE env var
- Maintain full test coverage with 13/13 Playwright tests passing for both modes
- Simplify testing infrastructure while preserving CI compatibility

Benefits:
- Single testing framework reduces complexity and maintenance
- Better debugging capabilities with Playwright
- Comprehensive test coverage maintained
- Environment-aware configuration for webpack/rspack testing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ScriptedAlchemy

advanced-api/dynamic-remotes/cypress.env.json

@@ -17,12 +17,8 @@
     "test:e2e": "npx playwright test",
     "test:e2e:ui": "npx playwright test --ui",
     "test:e2e:debug": "npx playwright test --debug",
-    "e2e:ci": "pnpm start & sleep 1 && wait-on tcp:3001 && wait-on tcp:3002 && wait-on tcp:3003 && npx cypress run --config-file ../../cypress-e2e/config/cypress.config.ts --config '{\"supportFile\": \"../../cypress-e2e/support/e2e.ts\"}' --spec \"./e2e/*.cy.ts\" --browser=chrome",
-    "legacy:e2e:ci": "pnpm legacy:start & sleep 1 && wait-on tcp:3001 && wait-on tcp:3002 && wait-on tcp:3003  && npx cypress run --config-file ../../cypress-e2e/config/cypress.config.ts --config '{\"supportFile\": \"../../cypress-e2e/support/e2e.ts\"}' --spec \"./e2e/*.cy.ts\" --browser=chrome",
-    "e2e:ci:cypress": "pnpm start & sleep 1 && wait-on tcp:3001 && wait-on tcp:3002 && wait-on tcp:3003 && npx cypress run --config-file ../../cypress-e2e/config/cypress.config.ts --config '{\"supportFile\": \"../../cypress-e2e/support/e2e.ts\"}' --spec \"./e2e/*.cy.ts\" --browser=chrome",
-    "legacy:e2e:ci:cypress": "pnpm legacy:start & sleep 1 && wait-on tcp:3001 && wait-on tcp:3002 && wait-on tcp:3003  && npx cypress run --config-file ../../cypress-e2e/config/cypress.config.ts --config '{\"supportFile\": \"../../cypress-e2e/support/e2e.ts\"}' --spec \"./e2e/*.cy.ts\" --browser=chrome",
-    "e2e:ci:playwright": "npx playwright test --reporter=list",
-    "legacy:e2e:ci:playwright": "npx playwright test --reporter=list"
+    "e2e:ci": "npx playwright test --reporter=list",
+    "legacy:e2e:ci": "LEGACY_MODE=true npx playwright test --reporter=list"
   },
   "devDependencies": {
     "@playwright/test": "^1.54.2",

advanced-api/dynamic-remotes/e2e/checkDynamicRemotesApps.cy.ts

@@ -31,19 +31,19 @@ export default defineConfig({
 
   webServer: [
     {
-      command: 'cd app1 && pnpm start',
+      command: `cd app1 && pnpm ${process.env.LEGACY_MODE ? 'legacy:start' : 'start'}`,
       port: 3001,
       timeout: 120000,
       reuseExistingServer: !process.env.CI,
     },
     {
-      command: 'cd app2 && pnpm start',
+      command: `cd app2 && pnpm ${process.env.LEGACY_MODE ? 'legacy:start' : 'start'}`,
       port: 3002,
       timeout: 120000,
       reuseExistingServer: !process.env.CI,
     },
     {
-      command: 'cd app3 && pnpm start',
+      command: `cd app3 && pnpm ${process.env.LEGACY_MODE ? 'legacy:start' : 'start'}`,
       port: 3003,
       timeout: 120000,
       reuseExistingServer: !process.env.CI,