dsh-base64-file: A File and Base64 Encoding Conversion Tool

`dsh-base64-file` is a conversion tool implemented in pure Node.js for converting local files to and from Base64 encoding, reducing repetitive work when embedding files in text. It provides two core functions: `file_to_base64` and `base64_to_file`. To install it, run the `dsh plugin add` command and enable it in your configuration. The tool is suitable for HTML or JSON use cases; however, note that it runs third-party code, so please review its source code and license yourself.