chore: add file permission check workflow

[kenjis]

Description
See #8918 (review)

Result:

Run php utils/check_permission_x.php

Files with unnecessary execution permissions were detected:
- admin/starter/tests/index.html
- admin/starter/tests/.htaccess
- app/Config/DocTypes.php
- system/Test/Mock/MockResponse.php
- system/Helpers/text_helper.php
- system/Helpers/cookie_helper.php
- system/Helpers/inflector_helper.php
- system/Helpers/html_helper.php
- system/HTTP/IncomingRequest.php
- system/Database/SQLSRV/Builder.php
- system/Database/SQLSRV/Connection.php
- system/Database/SQLSRV/PreparedQuery.php
- system/Database/SQLSRV/Forge.php
- system/Database/SQLSRV/Result.php
- system/Database/SQLSRV/Utils.php
- tests/system/Helpers/InflectorHelperTest.php
- tests/system/Helpers/HTMLHelperTest.php
- tests/system/Helpers/NumberHelperTest.php
- tests/system/Helpers/CookieHelperTest.php
- tests/system/Helpers/TextHelperTest.php
- user_guide_src/source/helpers/inflector_helper.rst
- user_guide_src/source/helpers/html_helper.rst
- user_guide_src/source/helpers/text_helper.rst
- user_guide_src/source/helpers/cookie_helper.rst
- user_guide_src/source/database/query_builder.rst
- user_guide_src/source/general/common_functions.rst
- writable/logs/index.html
- writable/index.html
- writable/debugbar/index.html
- writable/cache/index.html
- writable/.htaccess
- writable/uploads/index.html
- writable/session/index.html
Error: Process completed with exit code 1.

https://github.com/codeigniter4/CodeIgniter4/actions/runs/9296154395/job/25584234302?pr=8922

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• [] User guide updated
• [] Conforms to style guide