omdsh-chatmode: Add a Chat/Work mode switch to DeepSeek Harness

omdsh-chatmode is a chat mode plugin for the DeepSeek Harness web GUI (npm package `@omdsh-plugins/omdsh-chatmode`, v0.2.5, MIT) designed to solve the barrier of "asking questions on the fly without having to select a working directory first." It provides a Chat / Work toggle above the conversation: the Chat mode allows starting a dialogue without selecting a project directory; all chat...