fix: remove yalc and update paths for monorepo structure

- Remove watchIgnoreFiles yalc workaround from playground admin config
- Update test helper paths (appDir/distDir) to reference ../../apps/playground
- Update example.test.ts import path to ../../../apps/playground/tests/helpers
- Remove yalc section from playground .gitignore
- Delete root and playground yarn.lock files (pnpm replaces yarn)

Author: ayhid

apps/playground/.gitignore

@@ -128,10 +128,3 @@ dist
 build
 .strapi-updater.json
 .strapi-cloud.json
-
-############################
-# Yalc
-############################
-
-.yalc
-yalc.lock

apps/playground/config/admin.ts

@@ -17,7 +17,4 @@ export default ({ env }) => ({
     nps: env.bool('FLAG_NPS', true),
     promoteEE: env.bool('FLAG_PROMOTE_EE', true),
   },
-  watchIgnoreFiles: [
-    '!**/.yalc/**/server/**',
-  ],
 });

apps/playground/tests/helpers.ts

@@ -9,8 +9,8 @@ let instance;
 async function setupStrapi() {
   if (!instance) {
     const app = await createStrapi({
-      appDir: "./playground",
-      distDir: "./playground/dist",
+      appDir: "../../apps/playground",
+      distDir: "../../apps/playground/dist",
     }).load();
 
     instance = app; // strapi is global now