dsh-ponytail: Automatically Injecting Ponytail as a DSH Plugin

wenaixi/dsh-ponytail is an implementation example of the "everything is a plugin" philosophy in the DSH plugin ecosystem. It fully ports the upstream DietrichGebert/ponytail as a DSH plugin, providing 6 Chinese Skills (such as ponytail, review, audit, etc.) that are automatically activated through systemPrompt injection without requiring new empty tools. The plugin core includes the "Ladder 7 Steps" simplification principles (such as YAGNI, reuse, minimal implementation, etc.) and three intensity modes (lite, full, ultra). Once installed, the capabilities are automatically enabled, and mode switching or help viewing is supported via the /ponytail command. Configuration priority is: environment variables > cordis config > local config.j