Add sustech and zstatic into cdn providers. #347

Updates the README files to include the `git pull` command for updating the theme if it was installed via `git clone`.

This ensures that users have the latest version of the theme and can benefit from any new features or bug fixes.

This commit updates the preview workflow to run for all pull requests, regardless of the source repository. This will allow contributors to preview their changes before merging them into the main repository.

Remove the unnecessary condition in the preview workflow to allow the workflow to run on any push or pull request to the EvanNotFound/hexo-theme-redefine repository.

This commit removes unnecessary semicolons and trailing spaces from the `btn.js` file. These changes improve the code's readability and maintainability.

Bump vercel-deployment-for-github-actions to v1.1.0 in both preview and production-demo workflows.

Upgrade GitHub actions to the latest versions.

This includes:
- actions/github-script@v6
- actions/checkout@v3
- actions/setup-node@v3

This commit introduces new margin and width utilities to the stylesheet.

- Adds new margin utility classes: `my-0`, `my-0.5`
- Adds new width utility classes: `w-12`, `w-4`
- Adds new text size utility classes for small screens: `sm\:text-lg`, `sm\:text-2xl`

归档页文章增加标号

Bump version to 2.6.2 in package.json and package-lock.json.

…script

Added Python setup to preview workflow and changed developer mode enabling
method to use a Python script for better compatibility and readability.

…lement

Enhanced the preview workflow by adding logging to the YAML update script,
ensuring better traceability and error handling during the development mode
enablement process.