dsh-fun-waiting: Replace DSH's waiting prompt with rotating fun phrases

`dsh-fun-waiting` is a DSH desktop plugin developed by community maintainer JackyHuang75414. It replaces fixed waiting prompts in the chat interface, such as "DeepSeek is thinking, taking X seconds...", with rotating humorous phrases at intervals, such as "Slacking off", "Invading aliens", and "Destroying the world". It retains the original time information and utilizes separate phrase lists for Chinese and English interfaces. The configuration entry is located at "Settings → Fun Waiting Words"; by checking the box to enable, setting the millisecond interval, and entering one phrase per line, changes take effect immediately upon saving, requiring no file modification or restart. This article introduces the plugin's core features, two installation commands (`dsh plugin --profile desktop add github` or `link`), how configuration is persisted to `fun-waiting.settings.json` in the DSH home directory, and how to restore defaults by deleting the file. It also notes that the plugin runs with the current DSH process permissions, relies on the `cordis.patch.yml` patch mechanism, has specific version requirements for DSH, and advises checking the source code and MIT license before installation.