dsh-depth-of-field: A Depth of Field Calculator in Pure Node.js

The `dsh-depth-of-field` plugin in the DeepSeek Harness (DSH) ecosystem, maintained by uckkk, provides Agents with local, offline depth-of-field calculation capabilities. Implemented purely in Node.js, it performs precise calculations based on specified parameters and returns detailed results, eliminating reliance on network requests. Users can install it via a terminal command and invoke it directly within a session. Thanks to its MIT license and zero network overhead, it is well suited to scenarios with constrained network environments or local-processing requirements.