feat: new plugin zoom.yazi to zoom in or out of the preview image

zoom.yazi/README.md

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+> [!NOTE]
+> The latest Yazi nightly build is required to use this plugin at the moment.
+
+# zoom.yazi
+
+Enlarge or shrink the preview image of a file, which is useful for magnifying small files for viewing.
+
+Supported formats:
+
+- Images - [ImageMagick](https://imagemagick.org/) is required
+
+Note that, the maximum size of enlarged images is limited by the [`max_width`][max_width] and [`max_height`][max_height] configuration options, so you may need to increase them as needed.
+
+[max_width]: https://yazi-rs.github.io/docs/configuration/yazi#preview.max_width
+[max_height]: https://yazi-rs.github.io/docs/configuration/yazi#preview.max_height
+
+## Installation
+
+```sh
+ya pkg add yazi-rs/plugins:zoom
+```
+
+## Usage
+
+```toml
+# keymap.toml
+[[mgr.prepend_keymap]]
+on   = "+"
+run  = "plugin zoom 1"
+desc = "Zoom in hovered file"
+
+[[mgr.prepend_keymap]]
+on   = "-"
+run  = "plugin zoom -1"
+desc = "Zoom out hovered file"
+```
+
+## TODO
+
+- [ ] Support more file types (e.g., videos, PDFs), PRs welcome!
+
+## License
+
+This plugin is MIT-licensed. For more information check the [LICENSE](LICENSE) file.