dsh-ini: INI ↔ JSON Conversion Tool for DSH

The DSH ecosystem has added a new `dsh-ini` plugin for locally converting between INI and JSON formats. Maintained by uckkk, the plugin makes no network requests and runs quickly. Users can install and activate it via commands, then invoke the tools it provides within a session to perform format conversions. Since the plugin executes code locally, users are advised to review the source code before installation.