fix: use yarn link as fallback instead of file link

Replace file:.. fallback with yarn link which is more reliable.
Yarn link creates proper symlinks that Strapi can recognize,
whereas file:.. may not install correctly in all scenarios.

Workflow:
1. Try yalc (might fail on Node 20+)
2. If yalc fails, use yarn link as fallback
3. Install playground deps (plugin now available via link)

Author: MSACC

.github/workflows/tests.yml

@@ -36,22 +36,23 @@ jobs:
           cache: 'yarn'
       - name: Install dependencies plugin
         run: yarn --no-lockfile --unsafe-perm
-      - name: Push the package to yalc
+      - name: Build plugin
         run: yarn build
-      - name: Add yalc package to the playground
-        run: yarn playground:yalc-add
-      - name: Ensure plugin is available (fallback if yalc failed)
+      - name: Link plugin to playground
         run: |
-          cd playground
-          if [ ! -d ".yalc/strapi-plugin-config-sync" ]; then
-            echo "Yalc link failed, using file link as fallback"
-            sed -i 's|"strapi-plugin-config-sync": "link:.yalc/strapi-plugin-config-sync"|"strapi-plugin-config-sync": "file:.."|' package.json
-            # Remove lock and cache to ensure fresh install
-            rm -f yarn.lock
-            rm -rf node_modules/strapi-plugin-config-sync
+          # Try yalc first
+          yarn playground:yalc-add || true
+
+          # Check if yalc succeeded
+          if [ ! -d "playground/.yalc/strapi-plugin-config-sync" ]; then
+            echo "Yalc failed, using yarn link as fallback"
+            # Use yarn link instead
+            yarn link
+            cd playground
+            yarn link strapi-plugin-config-sync
           fi
       - name: Install dependencies playground
-        run: cd playground && yarn install --unsafe-perm --force
+        run: cd playground && yarn install --unsafe-perm
       - name: Build playground
         run: yarn playground:build
       # - name: Run unit tests