dsh-localnote: Channel "let's talk later" ideas into scheduled processing

dsh-localnote is a DSH host plugin designed to bridge the gap between capturing and processing fleeting thoughts. This plugin allows users to quickly record inspiration in a browser floating window and supports setting expiration times and actions. Upon reaching the set time, the system can either send a notification reminder or trigger a one-time AI Agent to expand the inspiration into structured results (such as point breakdowns or execution actions) and write them back. Core features include quick capture (including screenshots), scheduled follow-ups, AI automation, dual-channel notifications (Toast and system notifications), and real-time status tracking. The plugin uses the MIT license, persists data locally to `~/.localnote`, and provides a REST interface for querying and debugging. Installation requires cloning the code and running `pnpm dsh plugin` in the DSH root directory.