docs: add JSDoc type annotations to hexo event scripts

[MatrixNeoKozak]

What

Add JSDoc type annotations for the hexo parameter in configuration and vendors event scripts to improve type safety and enable IntelliSense in IDEs like VS Code.

Why

This change resolves the target issue or improvement.

How to test

Verify that the project builds/runs correctly and the specific bug/improvement is addressed.

Fixes #954

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