fix: remove packageManager field and use pnpm 10 in workflows

- Remove packageManager field from root package.json to avoid version conflicts
- Explicitly set pnpm version 10 in GitHub Actions workflows
- This resolves the ERR_PNPM_BAD_PM_VERSION error in CI

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

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

Author: ScriptedAlchemy

.github/workflows/on-pull-request.yml

@@ -138,6 +138,7 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
+          version: 10
           run_install: false
 
       - name: Setup Node.js with caching

.github/workflows/on-push.yml

@@ -65,6 +65,7 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
+          version: 10
           run_install: false
 
       - name: Setup Node.js with caching

package.json

@@ -217,6 +217,5 @@
     "report:generate": "allure generate ./cypress/results/allure-results --clean -o ./cypress/report",
     "report:open": "allure open ./cypress/report",
     "preinstall": "npx only-allow pnpm"
-  },
-  "packageManager": "[email protected]+sha512.f549b8a52c9d2b8536762f99c0722205efc5af913e77835dbccc3b0b0b2ca9e7dc8022b78062c17291c48e88749c70ce88eb5a74f1fa8c4bf5e18bb46c8bd83a"
+  }
 }