dsh-base36: Base36 Encoding Tool

`dsh-base36` is a plugin in the DeepSeek Harness (DSH) ecosystem, maintained by uckkk. It provides pure Node.js-based Base36 encoding, requires no network requests, and supports offline operation. After developers install it using the command `dsh plugin add github:uckkk/dsh-base36`, they can directly invoke its tools in a session to perform ID encoding, short link generation, and other operations.