Update Hugo Version and Fix Configuration

[AliParvini]

Description:

The website is currently built with Hugo v0.123.7, which is significantly outdated. Several configuration keys used in hugo.yaml have been deprecated in Hugo v0.158+ and will cause build errors in future releases. This issue covers upgrading Hugo and cleaning up the configuration file to match the new standards.

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Problems:

• Hugo version is over a year old and missing critical bug fixes and features
• Config keys like languageCode, languageName, and languageDirection are deprecated and need to be replaced with their modern equivalents (locale, label, direction)
• GitHub Actions workflow still pins the old Hugo version, meaning the production build is also outdated

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Tasks:

• Update Hugo version in GitHub Actions workflow to the latest stable release
• Replace deprecated language-related keys in hugo.yaml with their new equivalents
• Verify the site builds without any deprecation warnings after the changes
• Test both English and Persian language versions render correctly after the update

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Expected Outcome:

The site should build successfully with Hugo v0.162.1, both locally and in GitHub Actions, with no deprecation warnings in the build output. Both language versions should render correctly.