feat: Add Publications page layout

[Riceneeder]

• Created a new page layout (layout/pages/publications/publications.ejs) to display publication information including title, author, journal and DOI
• Created a new stylesheet for the publications page (source/css/layout/publications.styl) to define the layout and styling for publication items.
• Updated the main stylesheet (source/css/style.styl) to include the new publications styles.
• Updated the corresponding translation files

Usage:

1. Create data in source/_data/publications. yml, format example:

items:
- title: Deep Learning for Rice Yield
  authors: Alice Zhang, Bob Chen
  journal: Journal of Agricultural AI
  doi: 10.1234/example
  url: https://doi.org/10.1234/example 

2. Create a page 'hexo new page publications' and edit' source/publications/index. md ':

---
title: title
date: 2025-10-12 19:04:49
type: publications
---

with enable developer mode:

  developer:
    enable: true

The effect is as follows：