dsh-markdown-table: Convert JSON Array / 2D Array to Markdown Table

dsh-markdown-table is a DeepSeek Harness plugin implemented entirely in Node.js, capable of converting JSON arrays or two-dimensional arrays into Markdown tables. Developers can install it using `dsh plugin add dsh-markdown-table` and then convert data by passing an array to the `make_table` tool in a session. It works immediately after installation; please review the source code on your own.