lussey820/aitoearn-dsh-plugin: Port AiToEarn content creation suite to DeepSeek Harness plugin

# Introduction Developers building content automation agents often encounter situations where creative directions require manual alignment, scripts, images/text, and videos are generated using different tools respectively, and final publishing must be done manually. They have to write the bridging code for every intermediate step. Specifically, when calling external MCP endpoints, they often have to write HTTP requests or script glue code by hand. The philosophy of DeepSeek Harness (DSH) is "everything is a plugin," making such workflows suitable for encapsulation and reuse. Below, we introduce lussey820's `aitoearn-dsh-plugin`, which ports the AiToEarn content creation suite into a DSH plugin, enabling the complete pipeline of "creative guidance → script/image/text/video generation → Douyin publishing" within a DSH conversation. #